Question

C
8 4
I need help solving this. please

Answer 1

I know that n is 8 and r is 4
I also know that 8-4=4

Answer 2

and I know that the top of the equation is 8*7*6*5*4

Answer 3

how do I figure out the rest?

Answer 4

\[^{n}C _{r} = n!\space/(n-r)!\space*\space r!\]
\[^{8}C _{4} = 8!\space/(8-4)!\space*\space 4!\]
\[^{8}C _{4} = 8!\space/4!\space*\space 4!\]
\[^{8}C _{4} = 8*7*6*5*4!\space/4!\space*\space 4!\]
\[^{8}C _{4} = 8*7*6*5\space/ 4!\]

Answer 5

I am so lost! I have been trying this for over an hour and I am getting no were

Answer 6

wow your good! I would have never got that! Thank you

Answer 7

Anytime. :)

Answer 8

so the answer is 420 correct?

Answer 9

No the answer is 70! pellet I am still lost!

Answer 10

70 is the correct

Answer 11

how? I keep getting 420 or 160 I suck

Answer 12

8*7*6*5 = 1680
4*3*2*1=24
1680/24 = 70

Answer 13

wow ok Thank you again. Now I feel even more dumb then before.

Answer 14

You are just confused between topics. Nothing else.

Answer 15

Thank you!

Answer 16

anytime :)