从前100个正整数中选出两个数a和bQuantity A: the probability that both a and b are even intege

游客2024-01-12 47

问题从前100个正整数中选出两个数a和b
Quantity A: the probability that both a and b are even integers
Quantity B: the probability that (a+b) is even integer

选项 A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.

答案 B

解析偶数=偶数+偶数=奇数+奇数，所以a+b为偶数的概率=a，b同为奇数的概率+a，b同为偶数的概率，因此选择B。

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