Please help! Will fan and medal! Don't want answer, just want some to explain how to get the answer! Thank you! :)

Solve: 6C3

a. 120
b. 720
c. 20
d. 240

Question

Please help! Will fan and medal! Don't want answer, just want some to explain how to get the answer! Thank you! :)

Solve: 6C3

a. 120
b. 720
c. 20
d. 240

anonymous · Answer

http://openstudy.com/users/night-watcher#/updates/534809cde4b09cc4ebb426b2

solomonzelman · Answer

C(n,r) = 
C(6,3) =
6! / (3!(6 - 3)!) =
6! / (3!(3)!) =
(1×2×3×4×5×6)  /  (1×2×3) ( (1×2×3)  =
(4×5×6)  /   ( (1×2×3)  =   (cancel out some terms on top and bottom...
  2×5×2 = 
20

anonymous · Answer

okay thanks! :)