Q. 8

Mark the correct alternative in each of the following:

A person writes 4 letters and addresses 4 envelopes. If the letters are placed in the envelopes at random, then the probability that all letters are not placed in the right envelopes, is

A. 1/4

B. 11/24

C. 15/24

D. 23/24

Answer :

let P=all letters are dispatched in right letters


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