Question

The number of permutation 1 2 3 4 5 6 7 8 and 9 taken all at a time such that

Answer 1

Step-by-step explanation:

Number of permutations of 1, 2, 3, 4, 5, 6, 7, 8, and 9 taken all at a time are such that the digit 1 appearing somewhere to the left of 2 3 appearing to the left of 4 and 5 somewhere to the left of 6, is k×7!