题目

x>0

The probability that event A will occur is x, and the probability that event A will not occur is y, where y>3x.

Quantity A

x

Quantity B

选项

A.

The quantity in Column A is greater.

B.

The quantity in Column B is greater.


C.

The two quantities are equal.


D.

The relationship cannot be determined from the information given.


解析

P(A)=x A的对立事件的概率P=y 又因为:A的对立事件的概率P=1-P(A)=1−x 所以: 1−x=y 同时已知 y>3x 因此 1−x>3x 1>4x x<1/4 因为 1/4=0.25,1/5=0.2 x可以为0.23,因此选项A成立 x可以为0.15,因此选项B成立 最终答案为选项D
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