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1. $P (A) = \frac{1}{3}, P (B) = \frac{3}{4},$

Answer: Option C

Explanation:

P (A \cup B) = P (A) + P (B) - P (A) . P (B) = \frac{1}{3} + \frac{3}{4} - \frac{1}{3} X \frac{3}{4} = \frac{4 + 9 - 3}{12} = \frac{10}{12} = \frac{5}{6}

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