【GMAT考满分数学PS题库】Five spaces will be filled with numbers 1-5 at ran_真题_答案_解析 GMAT考满分官网

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题目内容

Five spaces will be filled with numbers 1-5 at random and use each number only once. What's the probability that these 5 numbers are arranged in order from large to small or from small to large?

A1/90
B1/60
C1/45
D1/30
E1/15

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正确答案: B

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