Question

What does P(B/A) = 0.50 mean in terms of the Venn diagram?

Answer 1

of the 4 people that have a sister, 2 of them have a brother

Explanation:

probability of B given A

given that the person has a sister, what is the probability they have a brother

P (B/A) = 1/2

with this venn diagram

of the 4 people that have a sister, 2 of them have a brother