150题里data analysis109页的一道题目

xiaoshangUID: 3686317

109页第五题 求大神解答

In a probability edxperiment,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

shenbaihuaUID: 3636915

B>A

zhanghq00UID: 3677355

A是r(1-s)+s(1-r)=r+s-2sr
小于
B是r+s-sr