Question

Probability

A and B are two events.

P(A)=0.25 , P(B)=0.5 and P(A and B)=0.15 .

What is the value of P(A or B) ?

Answer 1

0.60?

Answer 2

As long as they are nondisjoint, P(A U B) = P(A) + P(B) - P(A∩B)

You are right, you probably did 0.25 + 0.5 - 0.15