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

Redeem

Probabilty question

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Senior | Next Rank: 100 Posts
Posts: 85
Joined: Sat Jan 30, 2010 3:49 am
Location: Hyderbad, India
GMAT Score:660

Probabilty question

by abhi.genx7 » Fri Oct 01, 2010 11:18 am
From a group of 3 boys and 3 girls, 4 children are to be randomly selected. What is the probability that equal numbers of boys and girls will be selected?

A.1/10
B.1/2
C.4/9
D 2/3
E.3/5

Can any1 explain the method to be used to solve this problem please
Top
Source: — Problem Solving |
User avatar
Community Manager
Posts: 991
Joined: Thu Sep 23, 2010 6:19 am
Location: Bangalore, India
Thanked: 146 times
Followed by:24 members

by shovan85 » Fri Oct 01, 2010 11:39 am
4 children can be selected from 6 in 6C4 ways
2 girls can be selected from 3 in 3C2 ways
2 boys can be selected from 3 in 3C2 ways

(3C2 * 3C2)/6C4 =9/15 = 3/5

IMO E
Top
User avatar
Junior | Next Rank: 30 Posts
Posts: 17
Joined: Thu Jul 01, 2010 1:00 pm
Location: Houston
Thanked: 1 times

by TheCloakedMonk » Fri Oct 01, 2010 12:01 pm
shovan85 wrote:4 children can be selected from 6 in 6C4 ways
2 girls can be selected from 3 in 3C2 ways
2 boys can be selected from 3 in 3C2 ways

(3C2 * 3C2)/6C4 =9/15 = 3/5

IMO E
I did it the exact same way.
Anything is possible if you believe in yourself and have faith in your actions.
Top
Post new topic Post Reply
• Page 1 of 1