Question

select the correct choice that completes the sentence below.

the formula for finding the probability of event a or event b is \\(p(a \text{ or } b) =\\)

• \\(p(a \text{ and } b)\\)
• \\(p(a) + p(b) - p(a \text{ and } b)\\)
• \\(1 - p(a \text{ and } b)\\)
• \\(p(a) + p(b)\\)

Explanation:

Identify the general addition rule for probability

$$ P(A \text{ or } B) = P(A) + P(B) - P(A \text{ and } B) $$

Answer:

• P(A and B).
• P(A) + P(B) - P(A and B). (Correct answer)
• 1 - P(A and B).
• P(A) + P(B).