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NO.238
困难
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正确率：38%
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题目来源 : 数学强化400题

In a probability experiment, G and H are independent events. The probability that G will occur is r,

and the probability that H will occur is s, where both r and s are greater than 0.

Quantity A

the probability that either G will occur or H will occur, but not both

Quantity B

r+s –rs

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

Select one answer choice.

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