Chances are 50-50 that a newborn baby will be a girl. For families with five children,what is the probability that all the children are girls?
A)0.900
B)0.031
C)0.001
D)0.250

Question

Quizplus · Accepted Answer

The probability of any one child being a girl is 0.5. Since the gender of each child is independent of the others, the probability of having all five be girls is:

0.5 x 0.5 x 0.5 x 0.5 x 0.5 = 0.03125

or approximately 0.031. Therefore, the correct answer is choice B.

Chances Are 50-50 That a Newborn Baby Will Be a Girl