Question

If the events A and B are disjoint, A Intersection B =0, P(B) = 0.17 and P(A U B)=0.55. Find P(A)

Answer 1

Use the relation:
P(A∪B)=P(A)+P(B)+P(A∩B)
and solve P(A)

Note:
∩ = & c a p ;