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A: There are 4 letters and 4 addressed e...

A: There are 4 letters and 4 addressed envelopes. If the letters are put in the random in the envelopes , the probability that all the letters may be placed in wrongly addressed envelopes is `3//8`.
R: If n letters are put at random in the n addressed envelopes , the probability that all the letters may be in wrong envelopes = 1-`(1)/(1!) +(1)/(2!)-(1)/(3!)+.....+((-1)^(n))/(n!)`

A

Both A and R are true and R is the correct explanation of A.

B

Both A and R are true is not correct explanation of A.

C

A is true but R is false

D

A is false but R is true

Text Solution

Verified by Experts

The correct Answer is:
A
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