BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
GMATLiveTeach Starts Oct 17
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Chris Peckover, 100th-Percentile GMAT Scorer

Oct 17 · Chris Peckover
Sat · 11:00 AM to 2:00 PM ET
Oct 20 · Chris Peckover
Tue, Thu · 8:00 to 10:00 PM ET
Oct 25 · Josh Braslow
Sun · 1:00 to 4:00 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemand 5 seats left Start anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Ice-cream scoop, Percents

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Master | Next Rank: 500 Posts
Posts: 123
Joined: Tue Nov 23, 2010 7:18 pmFollowed by: 4 members
Location: Mumbai, India
Thanked: 5 times
by anirudhbhalotia » Thu Mar 10, 2011 9:32 am
At a certain picnic, each of the guests was served either a single scoop or a double scoop of ice-cream. How many of the guests were served a double scoop of ice-cream?

1. At the picnic, 60 percent of the guests were served a double scoop of ice-cream.

2. A total of 120 scoops of ice-cream were served to all the guests at the picnic.

OA - C[spoiler][/spoiler]
"Change is never a matter of ability but always a matter of motivation" - Anthony Robbins
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 261
Joined: Wed Mar 31, 2010 8:37 pmFollowed by: 3 members
Location: Varanasi
Thanked: 11 times

by ankur.agrawal » Thu Mar 10, 2011 10:30 am
anirudhbhalotia wrote:At a certain picnic, each of the guests was served either a single scoop or a double scoop of ice-cream. How many of the guests were served a double scoop of ice-cream?

1. At the picnic, 60 percent of the guests were served a double scoop of ice-cream.

2. A total of 120 scoops of ice-cream were served to all the guests at the picnic.

OA - C[spoiler][/spoiler]
Let,

N1 = No. of guests who received double scoops
N2= No. of guests who received single scoops

2N1+(N2) = 120 ---> (2)

(N1+N2)*(3/5) = N1. ---------(3)

Both Statements together are sufficient. No need to solve. :)

C
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1337
Joined: Sat Dec 27, 2008 6:29 pmFollowed by: 10 members
Thanked: 127 times

by Night reader » Thu Mar 10, 2011 2:04 pm
@hi, anirudhbhalotia
In the order prescribed by examiner trying to catch ALL the traps!

from reading the stem we realize that there Guests- several of them, call them N (guests) and people who were served EITHER (note this math) single scoop, call them S or double scoop, call them D, of ice cream. We need to find the VALUE (so we need to solve till the END, Value/Number)

st(1) 60% were served double scoop --> 0.6N=D; since we need Value and cannot assign from 1-0.6N that 0.4N were served single scoop (S) this is Not Sufficient;
st(2) 120 scoops were served to all guests --> S+D=N This is not sufficient, as we don't know how many people were served single or double scoops - we only know that all of them were served 120 scoops;
Combined st(1&2): from statement (1) we know that 0.6N=D and from statement (2) we know S+D=N. We can write down S/D=0.6N/04.N or S/D=3/2. Since (S+D)=5 and S/(S+D)=3/5 and D(S+D)=2/5 we can deduct S/120=3/5 and D/120=2/5 or D=120*2/5, D=48; S=120*3/5=72

This is sufficient to answer the question - how many of the guests were served double scoop of the ice-cream, it's 48/2=24.
anirudhbhalotia wrote:At a certain picnic, each of the guests was served either a single scoop or a double scoop or both of ice-cream. How many of the guests were served a double scoop of ice-cream?
anirudhbhalotia wrote:At a certain picnic, each of the guests was served either a single scoop or a double scoop of ice-cream. How many of the guests were served a double scoop of ice-cream?

1. At the picnic, 60 percent of the guests were served a double scoop of ice-cream.

2. A total of 120 scoops of ice-cream were served to all the guests at the picnic.

OA - C[spoiler][/spoiler]
Last edited by Night reader on Thu Mar 10, 2011 9:35 pm, edited 2 times in total.
My knowledge frontiers came to evolve the GMATPill's methods - the credited study means to boost the Verbal competence. I really like their videos, especially for RC, CR and SC. You do check their study methods at https://www.gmatpill.com
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 261
Joined: Wed Mar 31, 2010 8:37 pmFollowed by: 3 members
Location: Varanasi
Thanked: 11 times

by ankur.agrawal » Thu Mar 10, 2011 7:53 pm
Night reader wrote:@hi, anirudhbhalotia
In the order prescribed by examiner trying to catch ALL the traps!

from reading the stem we realize that there Guests- several of them, call them N (guests) and people who were served EITHER (note this math) single scoop, call them S or double scoop, call them D, of ice cream. We need to find the VALUE (so we need to solve till the END, Value/Number)

st(1) 60% were served double scoop --> 0.6N=D; since we need Value and cannot assign from 1-0.6N that 0.4N were served single scoop (S) this is Not Sufficient;
st(2) 120 scoops were served to all guests --> S+D=N and because guests were not served both single And double scoop we take N=120. This is not sufficient, as we don't know how many people were served single or double scoops - we only know that all of them were served 120 scoops;
Combined st(1&2): from statement (1) we know that 0.6N=D and form statement (2) we know N=120, we can rewrite 0.6*120=D, where D=72. This is sufficient to answer the question - how many of the guests were served double scoop of the ice-cream, it's 72. You can further consider that 72 is double scoop portion and the number of people served double scoops is 72/2 in case if double scoop is Unit*2 or leave it as it's because the thing will not influence our solution - the decrease in the proportion of D should be counted in S as well.

BUT what if we had condition below changed to
anirudhbhalotia wrote:At a certain picnic, each of the guests was served either a single scoop or a double scoop or both of ice-cream. How many of the guests were served a double scoop of ice-cream?
anirudhbhalotia wrote:At a certain picnic, each of the guests was served either a single scoop or a double scoop of ice-cream. How many of the guests were served a double scoop of ice-cream?

1. At the picnic, 60 percent of the guests were served a double scoop of ice-cream.

2. A total of 120 scoops of ice-cream were served to all the guests at the picnic.

OA - C[spoiler][/spoiler]

N= 120 ; How? Suppose 50 people got single scoop & remaining 70 got double scoop then the total no of scoops required will be 190 ( 50 + 2*70) . I am confused.

Pls split open this question for me . Its making me crazy.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members
Location: New York, NY
Thanked: 13060 times
GMAT Score:790

by GMATGuruNY » Thu Mar 10, 2011 8:32 pm
anirudhbhalotia wrote:At a certain picnic, each of the guests was served either a single scoop or a double scoop of ice-cream. How many of the guests were served a double scoop of ice-cream?

1. At the picnic, 60 percent of the guests were served a double scoop of ice-cream.

2. A total of 120 scoops of ice-cream were served to all the guests at the picnic.

OA - C[spoiler][/spoiler]
Statement 1: 60% of the guests were served a double scoop
Plug in 100 guests.
60 double-scoop guests served 2 scoops each = 60*2 = 120 scoops.
40 single-scoop guests served 1 scoop each = 40*1 = 40 scoops.
Thus, the double-scoop guests were served 120/160 = 3/4 of the scoops.
No way to determine the number of double-scoop guests.
Insufficient.

Statement 2: total scoops = 120
No way to determine the number of double-scoop guests.
Insufficient.

Statements 1 and 2 combined:
The double-scoop guests were served 3/4*120 = 90 scoops.
Since each double-scoop guest received 2 scoops, double-scoop guests = 90/2 = 45.
Sufficient.

The correct answer is C.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1337
Joined: Sat Dec 27, 2008 6:29 pmFollowed by: 10 members
Thanked: 127 times

by Night reader » Thu Mar 10, 2011 9:15 pm
Hi, I had to revise my solution above to account not for guests BUT for scoops=120.
ankur.agrawal wrote:
N= 120 ; How? Suppose 50 people got single scoop & remaining 70 got double scoop then the total no of scoops required will be 190 ( 50 + 2*70) . I am confused.

Pls split open this question for me . Its making me crazy.
My knowledge frontiers came to evolve the GMATPill's methods - the credited study means to boost the Verbal competence. I really like their videos, especially for RC, CR and SC. You do check their study methods at https://www.gmatpill.com
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 123
Joined: Tue Nov 23, 2010 7:18 pmFollowed by: 4 members
Location: Mumbai, India
Thanked: 5 times

by anirudhbhalotia » Thu Mar 10, 2011 9:48 pm
ankur.agrawal wrote:
anirudhbhalotia wrote:At a certain picnic, each of the guests was served either a single scoop or a double scoop of ice-cream. How many of the guests were served a double scoop of ice-cream?

1. At the picnic, 60 percent of the guests were served a double scoop of ice-cream.

2. A total of 120 scoops of ice-cream were served to all the guests at the picnic.

OA - C[spoiler][/spoiler]
Let,

N1 = No. of guests who received double scoops
N2= No. of guests who received single scoops

2N1+(N2) = 120 ---> (2)

(N1+N2)*(3/5) = N1. ---------(3)

Both Statements together are sufficient. No need to solve. :)

C
This doesn't seem the right approach to me. You have to evaluate each statement...
"Change is never a matter of ability but always a matter of motivation" - Anthony Robbins
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 123
Joined: Tue Nov 23, 2010 7:18 pmFollowed by: 4 members
Location: Mumbai, India
Thanked: 5 times

by anirudhbhalotia » Thu Mar 10, 2011 10:08 pm
GMATGuruNY wrote:
anirudhbhalotia wrote:At a certain picnic, each of the guests was served either a single scoop or a double scoop of ice-cream. How many of the guests were served a double scoop of ice-cream?

1. At the picnic, 60 percent of the guests were served a double scoop of ice-cream.

2. A total of 120 scoops of ice-cream were served to all the guests at the picnic.

OA - C[spoiler][/spoiler]
Statement 1: 60% of the guests were served a double scoop
Plug in 100 guests.
60 double-scoop guests served 2 scoops each = 60*2 = 120 scoops.
40 single-scoop guests served 1 scoop each = 40*1 = 40 scoops.
Thus, the double-scoop guests were served 120/160 = 3/4 of the scoops.
No way to determine the number of double-scoop guests.
Insufficient.

Statement 2: total scoops = 120
No way to determine the number of double-scoop guests.
Insufficient.

Statements 1 and 2 combined:
The double-scoop guests were served 3/4*120 = 90 scoops.
Since each double-scoop guest received 2 scoops, double-scoop guests = 90/2 = 45.
Sufficient.

The correct answer is C.
This somehow makes sense...but here again we tend to solve it...is this the best way?

damn I hate DS...just not able to analyze and suffice! :-(
"Change is never a matter of ability but always a matter of motivation" - Anthony Robbins
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 261
Joined: Wed Mar 31, 2010 8:37 pmFollowed by: 3 members
Location: Varanasi
Thanked: 11 times

by ankur.agrawal » Thu Mar 10, 2011 10:28 pm
anirudhbhalotia wrote:
ankur.agrawal wrote:
anirudhbhalotia wrote:At a certain picnic, each of the guests was served either a single scoop or a double scoop of ice-cream. How many of the guests were served a double scoop of ice-cream?

1. At the picnic, 60 percent of the guests were served a double scoop of ice-cream.

2. A total of 120 scoops of ice-cream were served to all the guests at the picnic.

OA - C[spoiler][/spoiler]
Let,

N1 = No. of guests who received double scoops
N2= No. of guests who received single scoops

2N1+(N2) = 120 ---> (2)

(N1+N2)*(3/5) = N1. ---------(3)

Both Statements together are sufficient. No need to solve. :)

C
This doesn't seem the right approach to me. You have to evaluate each statement...
I think this approach is correct. On solving the two equations I get N1= 45 .

Equations (2) & (3) bring out exactly what is mentioned.

Pls point out specific mistakes in my equation. I feel it is correct. Pls correct if i have a logic gap here.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1