Probability
Independent Events
Premium Question
Grade 12

Question:

$A$ and $B$ are independent events with $P(A) = \frac{1}{2}$ and $P(B) = \frac{1}{3}$. Then $P(A \cup B)$ equals:
(1) $\frac{5}{6}$
(2) $\frac{2}{3}$
(3) $\frac{1}{2}$
(4) $\frac{3}{4}$

Step-by-Step Solution

Key Concept: Use $P(A \cup B) = P(A) + P(B) - P(A \cap B)$, and recall that for independent events $P(A \cap B) = P(A) P(B)$.
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Correct Answer: (2)

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