1.

Number of permutations of 1,2,3,4,5,6,7,8 and 9 taken all at a time such that1 appears to the left of 2 3 appears to the left of 4 and 5 appears to the left of 6 is k×7!, then the value of k is

Answer» Number of permutations of 1,2,3,4,5,6,7,8 and 9 taken all at a time such that

1 appears to the left of 2

3 appears to the left of 4 and

5 appears to the left of 6 is k×7!, then the value of k is


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