In how many ways 6 letters can be placed in 6 addressed envelopes such that 1.at four letters are placed in correct envelopes 2.at most three letters are placed in wrong envelopes

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Arun · Answer

Dear student this is a question of dearrangement hence in 1 st part we have to calculate D4 = 9 in 2 nd part wehave to calculate D2 + D3

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In how many ways 6 letters can be placed in 6 addressed envelopes such that 1.at four letters are placed in correct envelopes 2.at most three letters are placed in wrong envelopes

In how many ways 6 letters can be placed in 6 addressed envelopes such that 1.at four letters are placed in correct envelopes 2.at most three letters are placed in wrong envelopes

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In how many ways 6 letters can be placed in 6 addressed envelopes such that 1.at four letters are placed in correct envelopes 2.at most three letters are placed in wrong envelopes

In how many ways 6 letters can be placed in 6 addressed envelopes such that 1.at four letters are placed in correct envelopes 2.at most three letters are placed in wrong envelopes

1 Answers

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