Questions
A local post office is to send M telegrams which are distributed at random over N communication channels, (N > M). Each telegram is sent over any channel with equal probability. Chance that not more than one telegram will be sent over each channel is
detailed solution
Correct option is B
Since lines are more than telegrams, NCM are those lines where telegrams will be sent.So, number of favourable cases =NCM×M!Total number of cases = NM [As first telegram can go in any one of n lines]So, required probability= NCM×M!NMTalk to our academic expert!
Similar Questions
A bag contains 10 different balls. Five balls are drawn simultaneously and then replaced and then seven balls are drawn. If the probability that exactly three balls are common to the two draws is p, then the value of 8p is ________.
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