Question

A train arrives at a station every 20 minutes. What is the probability that a person arriving at the
station will have to wait less than half an hour for the next train?​

Answer 1

Answer:

1

Step-by-step explanation:

X~U(0,20)

F(x) = 0 ; x> a

1/(b-a) ; a<= x <= b

1 ; x>b

Answer 2

Answer: The probability that a person arriving at the station will have to   wait less than half an hour for the next train is 1.

Step-by-step explanation:

The gap between arrival of two trains is 20 minutes. Therefore, the maximum time for which a person has to wait is 20 minutes which will be the case when person arrives at station just when first train is leaving and misses it. Then , to catch the second train person will have to wait for 20 minutes. In all other cases , the person has to wait for less than 20 minutes.

Hence , the probability that a person arriving at the station will have to   wait less than half an hour for the next train is 1.

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