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The number of permutations of letters so that neither the pattern nor appears is
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Text solutionVerified
The total number of permutations
Let A be the property that occurs and B be the property that occurs.
Number of permutations with A =that of with B and
Thus
Thus required number
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Question Text | The number of permutations of letters so that neither the pattern nor appears is |
Answer Type | Text solution:1 |
Upvotes | 150 |