|
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 Leo likes, he listens to it; if not, he turn off the radio. For each station, the probability is 0.3 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.
0.027 0.090 0.417 0.657 0.900
the answer is D.
looking forward to an expert's explanation. | 
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2006-4-29 17:03:00
楼主