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

Answer 1

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

Answer 2

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

Answer 3

okay thanks! :)