+0

# Permutations, help!

0
200
3
+77

Aug 21, 2018

#1
+196
0

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.

Aug 21, 2018
#2
0

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

Aug 21, 2018
#3
+4249
+1

(a) Permutations:  n!/(n-r)!

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

Aug 21, 2018
edited by tertre  Aug 21, 2018