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  • In how many ways can 10 letters be placed in 10 addressed envelopes such that exactly 9 letters are in the correct envelope?Option: 1 1

In how many ways can 10 letters be placed in 10 addressed envelopes such that exactly 9 letters are in the correct envelope?

Option: 1

1


Option: 2

10! - 1


Option: 3

0


Option: 4

None of these


Answers (1)

best_answer

If exactly 9 letters are in their correct envelopes, then 10th will definitely be in its correct envelop as well

So, no such way

Posted by

HARSH KANKARIA

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