Question

There are 8 people on the debate team. In how many ways can the coach choose 4 members to send to competition?
answers
70
1,680
40,320

Answer 1

The formula for combinations is:
n! / k!*(n-k)!
n = 8 k = 4

8! / 4!*4!

(8*7*6*5*4*3*2*1) / 24 * 24

(8*7*6*5) / 24

=2 * 7 * 5

= 70

Answer 2

Thank you !