Question

Given P(A)=0.48, P(B)=0.75 and P(A∩B)=0.43, find the value of P(A∪B), rounding to the nearest thousandth, if necessary.

Answer 1

P(A ∪ B) = P(A) + P(B) − P(A ∩ B) = 0.48 + 0.75 − 0.43 = 0.80

Rounded to the nearest thousandth: 0.800.