Permutations Without Specific Strings (Jee Mains) | ExamDuo
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Permutations
Hard
Permutations Without Specific Strings
The number of permutations of the digits
1
,
2
,
3
,
.
.
.
.
,
7
without repetition, which neither contain the string 153 nor the string 2467 , is _______.
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