Asked by TTR+S<3

1. Solve:

6C3

120***?
720
20
240

is this right?

11 years ago

Answered by Steve

no -- 6*5*4 / 1*2*3 = 20

You calculated 6P3

11 years ago

Answered by TTR+S<3

oh, that's actually what i thought at first. i had a little debate.
anyway thank you!:)

11 years ago

Answered by Damon

for combinations:
n!/[r!(n-r)!]

6! /[ 3! (6-3)! ]

6*5*4/ (3*2*1)

11 years ago

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