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[Issue Essay]
试题详情
题目：
Analytical!
选项:
答案:
提问：
On his drive to work, Leo listens to one of three radio stations, A,
B, or C. He first turns to A. If A is playing a song he likes, he
listens to it; if not, he turns to B. If B is playing a song he likes, he
listens to it; if not, he turns to C. If C is playing a song he likes, he
listens to it; if not, he turns off the radio. For each station, the
probability is 0.30 that at any given moment the station is playing a
song Leo likes. On his drive to work, what is the probability that
Leo will hear a song he likes?
这个题目的0.3为什末代指在A station 播放到了自己喜欢的？不太理解0.3到底指的是甚麽
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