6 letters are to be placed in 6 addressed envelopes. Each letter is assigned for an envelope. In how many ways these letters can be put in these envelopes such that exactly one letter goes in the correct envelope.

264

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260

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270

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None of these

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Solution

The correct option is A
264

A

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Q. There are four different letters and four addressed envelopes, in how many ways can the letter be put in the envelopes so atleast one letter goes into the correct envelope

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6 letters are to be placed in 6 addressed envelopes. Each letter is assigned for an envelope. In how many ways these letters can be put in these envelopes such that exactly one letter goes in the correct envelope.

The correct option is A 264 A

The correct option is A
264

A