A candidate has to reach the examination...

A candidate has to reach the examination centre in time. Probability of him going by bus or scooter by other means of transport are 3/10, 1/10, 3/5 respectively. The probability that he will be late is 1/4 and 1/3 respectively, if he travels by bus or scooter. But he reaches in time if he uses any other mode of transport. He reached late at the centre. Find the probability that he travelled by bus

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Appilications of Derivative
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