【GMAT考满分数学PS题库】There are 21 songs in a music CD, where two songs _真题_答案_解析 GMAT考满分官网

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题目内容

There are 21 songs in a music CD, where two songs are from the same musician James. What is the probability that these two songs are arranged to play on the first two places ?

A1/110
B1/200
C1/210
D1/220
E1/225

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正确答案: C

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