NIFT UG 2015 Question Paper with solutions

Question : 57 of 150

Marks: +1, -0

A couple plans to have two children. What is the probability that the couple gets one girl and one boy?

$1/2$
$1/4$
$3/4$
$1/6$

Solution:

Total possibility for two child = {(B, B), (G, G), (G, B), (B, G)}
{Here, B = Boy, G = Girl}
Possibility for one Boy and one Girl = {(B, G), (G, B)}
Hence, required probability

=2/4=1/2

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