Permutations, help!

Simply calculate the values of the combinations and multiply for the first problem.

The second problem is really just 13578^-1, which you can calculate.

Try solving.

If this is what you mean by (a), then:

7324165 nPr 645231* 1234567  nPr 123456

=2.620 131 405 190 192 662 934 080 966 39 E+5,165,891

(a) Permutations:  n!/(n-r)!

(b): Since the power is -1, we can rewrite the number as 1/that number, so \((13578)^{-1}=\frac{1}{13578}\) .