1.

If 5 letters are placed in 5 addressed envelopes and A,B,C defines the events that Exactly one letter is placed wrongly, atleast one placed wrongly, all are placed wrongly. Then the descending order of their probabilities is

Answer»

<P>`p(A),p(B),p(C )`
`p(B),p(C ),p(A)`
`p(C ),p(B),p(A)`
`p(A),p(C ),p(B)`

ANSWER :B


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