Question

Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region.
Determine
n(A)
n(B)
P(A)
P(B)
P(A|B)
P(B|A)

Answer 1

I'll do half: n(A)=100, p(A)=100/190, p(A|B)=40/130

Answer 2

n(B)=130
p(B)=130/190

Answer 3

based on what's done above
I would assume 40 /100