A doctor is to visit a patient. From the past experience, it is known that the probabilities that he will come by train, bus, and scooter or by other means of transport are respectively 0.3, 0.2, 0.1 and 0.4. The probabilities that he will be late are 1/4 , 1/3 and 1/12, if he comes by train, bus and scooter respectively, but if he comes by other means of transport, then he will not be late. When he arrives, he is late. The probability that he comes by bus is:

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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A doctor is to visit a patient. From the past experience, it is known that the probabilities that he will
come by train, bus, and scooter or by other means of transport are respectively 0.3, 0.2, 0.1 and 0.4.
The probabilities that he will be late are 1/4 , 1/3 and 1/12, if he comes by train, bus and scooter
respectively, but if he comes by other means of transport, then he will not be late. When he arrives, he
is late. The probability that he comes by bus is:
Transcribed Image Text:A doctor is to visit a patient. From the past experience, it is known that the probabilities that he will come by train, bus, and scooter or by other means of transport are respectively 0.3, 0.2, 0.1 and 0.4. The probabilities that he will be late are 1/4 , 1/3 and 1/12, if he comes by train, bus and scooter respectively, but if he comes by other means of transport, then he will not be late. When he arrives, he is late. The probability that he comes by bus is:
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