Question

Find the indicated probability.

Answer 1

Answer:

P(A or B) = 0.9.

Step-by-step explanation:

This is a question of Venn probabilities.

We use the following relation to solve this question.

$P(A \cup B) = P(A) + P(B) - P(A \cap B)$

The exercise states that:

$P(A) = 0.7, P(B) = 0.6, P(A \cap B) = 0.4$

Then

$P(A \cup B) = P(A) + P(B) - P(A \cap B) = 0.7 + 0.6 - 0.4 = 0.9$

The answer is:

P(A or B) = 0.9.