【GMAT考满分数学PS题库】At a large company, the probabilities of succes_真题_答案

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At a large company, the probabilities of success of three distinct new product launches are independently $\frac{1}{4}$ , $\frac{1}{2}$ , and $\frac{5}{8}$ , respectively. What is the probability that exactly two of the launches succeed?

A
$\frac{7}{8}$
B
$\frac{1}{2}$
C
$\frac{23}{64}$
D
$\frac{5}{64}$
E
$\frac{3}{64}$

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正确答案: C

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