Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
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.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 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
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
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
GMATOnDemandStart 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 563 reviewsTarget Test Prep

average

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 30
Joined: Sun Jun 27, 2010 7:55 pm
by [email protected] » Wed Jun 30, 2010 6:55 pm
The average age of 8 persons in a committee is increased by 2 years when two men aged 35 years and 45 years
are substituted by two women. The average age of these two women is:
Top
Join the discussion
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 294
Joined: Wed May 05, 2010 4:01 am
Location: india
Thanked: 57 times

by amising6 » Wed Jun 30, 2010 7:25 pm
[email protected] wrote:The average age of 8 persons in a committee is increased by 2 years when two men aged 35 years and 45 years
are substituted by two women. The average age of these two women is:
now a shortcut based on logic
when two wommen were added average age of 8 member increased by 2 years i.e they added 2 years to each member age so total age added 2*8=16
now two men who left teir total age are 35+45=80
so age of women who replaced them must be 80+16=96
so average age of joining women =96/2=48
Ideation without execution is delusion
Top
Join the discussion

GMAT/MBA Expert

GMAT Instructor
Posts: 1179
Joined: Sun Apr 11, 2010 9:07 pmFollowed by: 88 members
Location: Milpitas, CA
Thanked: 447 times

by Rahul@gurome » Wed Jun 30, 2010 7:37 pm
Solution:
Let the average age of the 8 persons in the committee be x.
So total age is 8*x = 8x.
Let the total age of the two women substituted be y.
When the two men aged 35 and 45 are removed and the two women replaced in the committee, the total age is 8x – (35+45)+y = 8x – 80 + y.
So the new average age is (8x – 80 + y)/8 = x – 10 +y/8.
This is 2 more than original average age x.
So (x – 10 +y/8) – x = 2.
Or y/8 = 12.
Or y = 96.
We need the average age of the two women which is 96/2 = 48 years.
Rahul Lakhani
Quant Expert
Gurome, Inc.
https://www.GuroMe.com
On MBA sabbatical (at ISB) for 2011-12 - will stay active as time permits
1-800-566-4043 (USA)
+91-99201 32411 (India)
Top
Join the discussion
User avatar
Legendary Member
Posts: 1460
Joined: Tue Dec 29, 2009 1:28 amFollowed by: 7 members
Thanked: 135 times

by selango » Wed Jun 30, 2010 9:45 pm
Average=Sum of 8 peoples/8

A=(Sum of 6 peoples+35+45)/8

A=(Sum of 6 peoples+80)/8--Eqn1

2 women W1 and W2 replace 35 and 45 aged people.

A=(Sum of 6 peoples+W1+w2)/8

Sub A from eqn 1 above,

(Sum of 6 peoples+80)/8=(Sum of 6 peoples+W1+w2)/8

We will get W1+W2=96

Average of two women=96/2=48
Top
Join the discussion