Proability

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ILULA08: Senior | Next Rank: 100 Posts; Posts: 56; Joined: Tue Mar 31, 2009 12:17 am; GMAT Score:750+

by ILULA08 » Tue Aug 11, 2009 8:12 pm

Q5:
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. 4/9
C. 1/2
D. 3/5
E. 2/3

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Source: Beat The GMAT — Problem Solving | Tue Aug 11, 2009 8:12 pm

prindaroy: Master | Next Rank: 500 Posts; Posts: 113; Joined: Thu Jul 16, 2009 11:23 am; Thanked: 15 times; GMAT Score:730

by prindaroy » Tue Aug 11, 2009 8:37 pm

D

(3c2 * 3c2)/6c4 = 9/15 = 3/5

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ILULA08: Senior | Next Rank: 100 Posts; Posts: 56; Joined: Tue Mar 31, 2009 12:17 am; GMAT Score:750+

by ILULA08 » Tue Aug 11, 2009 8:52 pm

Yeah thats the answer D.

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