How do you simplify #""_10P_8#?
1 Answer
May 6, 2017
Explanation:
The permutation general formula is:
and so the question is how to calculate:
There are two ways to do it:
- We can look up the values on a chart (I use the one at https://www.mathsisfun.com/numbers/factorial.html), and so
#10! = 3,628,800 and 2! = 2# , giving us:
#(3,628,800)/2=1,814,400#
- Or we can show the multiplications:
#(10xx9xx8xx7xx6xx5xx4xx3xxcancel2)/cancel2=1,814,400#
