Question

If P(A)=0.3, P(B) = 0.5, and P(A and B) = 0.1, find P(A or B).

Answer 1

Answer:  0.7

Work Shown:

P(A or B) = P(A) + P(B) - P(A and B)

P(A or B) = 0.3 + 0.5 - 0.1

P(A or B) = 0.8 - 0.1

P(A or B) = 0.7