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If n things are arranged in a row, the n...

If n things are arranged in a row, the number of way in which they can be arranged so that non occupies its original position is `n!(1-(1)/(1!)+(1)/(2!)-(1)/(3!)+* * * + (-1)^(n)(1)/(n!))`
The number of ways of putting at least 3 out of 6 letters in wrong envelops is

A

265

B

40

C

704

D

50

Text Solution

Verified by Experts

The correct Answer is:
C
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