GMAT Quantitative Reasoning Practice Test 4

Question : 85 of 100

Marks: +1, -0

The probability of having a girl is identical to the probability of having a boy. In a family with three children, what is the probability that all the children are of the same gender?

1/8
1/6
1/3
1/5
$1 \/ 4$

Validate

Solution:

The gender of the first-born is insignificant since we want all children to be of the same gender no matter if they are all boys or girls.
The probability for the second child to be of the same gender as the first is: 1/2. The same probability goes for the third child. Therefore, the answer is

1/2 x 1/2 = 1/4

Go to Question:

Prev Question

Next Question