Question

From 9 names on a ballot a committee of 4 will be elected to attened a political national convention. How many differnet committees are possible

Answer 1

Help

Answer 2

36

Answer 3

My answer says 126

Answer 4

9C4

Answer 5

What's the c

Answer 6

COMBINATION
remember it the fomula :
nCr = n!/{(n-r)!r!}

Answer 7

I get that but it doesn't match with the answer of 126 that I have to have

Answer 8

9C4 = 9!/(9-4)!4! = 9!/5!4! = 9*8*7*6*5!/(5!*4*3*2*1)
= 9*8*7*6 / 4*3*2*1 = 126