Question

A and B are mutually exclusive events. P(A) = 0.50 and P(B) = 0.30. What is P(A or B)

Answer 1

Since A and B are mutually exclusive, P(A or B) = P(A) + P(B). So P(A or B) = 0.50 + 0.30 = 0.80.

Answer 2

Option: D is the correct answer.

D. 0.80

Explanation:

We know that when two events event A and event B are mutually exclusive then,P(A∩B)=0.

As we know that the P(A or B) is given by:

P(A∪B)=P(A)+P(B)-P(A∩B)

For mutually exclusive events A and B we have:

P(A∪B)=P(A)+P(B)

We have:

P(A)=0.50 and P(B)=0.30

Hence,

P(A∪B)=0.50+0.30

Hence,

P(A∪B)=0.80