There are 210 ways to choose 4 persons from a group of 10.
The formula for "10 choose 4" is:
10! / (4! x 6!)
= (10 x 9 x 8 x 7) / (4 x 3 x 2 x 1)
= 5040 / 24
= 210
Chat with our AI personalities
it is a combination: 9!/4!=9 x 8 x 7 x 6
40 x 39 x 38 x 37 = 2193360
You can arrange the letters in group One hundred and twenty-five different ways.
There are 9*8*7 = 504 ways.
-6