Question

assuming equal sex ratios, if a mating has already produced 3 girls, what is the probability that the next child will be a girl?
0%
12.5%
25%
50%
100%

Explanation:

Step1: Identify independent events

Each child's sex is an independent event; prior births do not affect the probability of the next child's sex.

Step2: Apply equal sex ratio

Given equal sex ratios, the probability of having a girl is $\frac{1}{2} = 50\%$.

Answer:

D. 50%