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.

700+ spoiled apples

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Junior | Next Rank: 30 Posts
Posts: 23
Joined: Mon Nov 16, 2009 12:51 am
by munaf » Wed Dec 09, 2009 5:44 am
16) A basket has 5 apples, one is spoiled. If Henry picked 2 apples simultaneously and at random, what is probability that the 2 selected apples will include the spoiled one.
a. 1�5
b. 2�10
c. 2�5
d. 1�2
e. 3�5
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
User avatar
Community Manager
Posts: 1537
Joined: Mon Aug 10, 2009 6:10 pmFollowed by: 252 members
Thanked: 653 times

by papgust » Wed Dec 09, 2009 7:31 am
Total number of ways of selecting 2 apples is 5C2 = 10

Of which, one is rotten. This means that out of 4 apples there is a rotten fruit (There is 1 good apple out of 2 selected apples). That means, total ways of having a spoiled fruit is 4.

Probability that 2 selected apples will include a spoiled one is 4/10 = 2/5 (Choice C)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 23
Joined: Mon Nov 16, 2009 12:51 am

by munaf » Wed Dec 09, 2009 11:12 pm
How you got 4 in the numerator..some one please explain.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 81
Joined: Wed Apr 08, 2009 3:12 pm
Location: South Korea
Thanked: 4 times

by sadullaevd » Wed Dec 09, 2009 11:45 pm
OA plz?
Stay skeptical,
Think critically,
Assume nothing.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 23
Joined: Mon Nov 16, 2009 12:51 am

by munaf » Thu Dec 10, 2009 12:09 am
OA- C
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Newbie | Next Rank: 10 Posts
Posts: 4
Joined: Wed Dec 02, 2009 5:01 am

by AVRMBA » Thu Dec 10, 2009 2:19 am
Hi Munaf,

Here as per my understanding this question can be solved in this way:

Henry picks 2 apples from 5 apples in the basket so total possible ways is:5c2= 10.

Possibility that 2 selected apples include spoiled one is (Probality of getting one spolied one + Probability of getting one good one from the 4 apples)

this probability will be 1 + 4c1 = 5

Hence the probability of getting one spoiled among the two apples picked randomly is 5/10 = 1/2.

Rgds,
AVR.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Community Manager
Posts: 1537
Joined: Mon Aug 10, 2009 6:10 pmFollowed by: 252 members
Thanked: 653 times

by papgust » Thu Dec 10, 2009 2:25 am
munaf wrote:How you got 4 in the numerator..some one please explain.
You select 2 apples out of 5. Out of those 2, 1 is a good fruit. The other is the rotten fruit.

Number of ways of choosing that rotten fruit is 4C1 = 4 (No. of ways to select a rotten fruit out of 4 apples. We are not taking the 5th apple into account because we have already chosen that 5th fresh apple)

I hope this is clear!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 9
Joined: Thu Dec 10, 2009 3:04 pm
Thanked: 2 times

by qazpt » Thu Dec 10, 2009 3:10 pm
Try this way. 1 minus the chance of getting no rotten apples

1)chance of getting no rotten apples
1 1st chance is 4/5
2nd chance is 3/4

then multiply (3/4)(4/5) = 12/20

1- (12/20) = 8/20 (chance of not getting a rotten apple) =4/10 = 2/5
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 23
Joined: Mon Nov 16, 2009 12:51 am

by munaf » Sun Dec 13, 2009 3:20 am
Thanks Guys!!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1578
Joined: Sun Dec 28, 2008 1:49 amFollowed by: 9 members
Thanked: 82 times
GMAT Score:720

by maihuna » Sun Dec 13, 2009 9:43 am
munaf wrote:16) A basket has 5 apples, one is spoiled. If Henry picked 2 apples simultaneously and at random, what is probability that the 2 selected apples will include the spoiled one.
a. 1�5
b. 2�10
c. 2�5
d. 1�2
e. 3�5
Simultaneously doen't mean anything: Out of 2-picks one should be spoiled one: can be done in : 2*(4/5)*(1/4) = 2/5
Charged up again to beat the beast :)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 13
Joined: Tue Aug 18, 2009 8:50 pm
Location: Delhi India
Thanked: 1 times

by homersimpson » Fri Dec 18, 2009 11:04 pm
This should be as stated in many posts above:
(1C1 x 4C1)/ 5C2

1C1 = number of ways you can take out one rotten apple
4C1 = number of ways you can take out one fresh apple out of 4
5C2 = number of ways you can take out 2 apples out of 5.

Cheers
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1