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can u help me with this question?
In how many ways can the 26 letters of alphabet be permuted so that none of the patterns CAR, DOG, PUN or BYTE occurs. Also, find the number of permutation of the 26 English alphabets which contain
(i) Exactly three (ii) atleast three of the patterns CAR, DOG, PUN and BYTE.

can u help me with this question?

In how many ways can the 26 letters of alphabet be permuted so that none of the patterns CAR, DOG, PUN or BYTE occurs. Also, find the number of permutation of the 26 English alphabets which contain

(i) Exactly three (ii) atleast three of the patterns CAR, DOG, PUN and BYTE.

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