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Statistics · PROB

Probability Rules — Addition Rule and Complement

A bar graph shows numbers as bars. Taller bar = bigger number.

StatisticsCommon Core VAR-4.DPROBVerified correct ✓

Worked examples

Two events A and B have P(A) = 3/8, P(B) = 2/5, and P(A and B) = 1/3. What is P(A or B)?
Answer: 0.4417
Two events A and B have P(A) = 2/9, P(B) = 2/5, and P(A and B) = 1/5. What is P(A or B)?
Answer: 0.4222

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