SOLUTION: How many combinations of 6 volunteers can be selected from a group of 9 volunteers? Is it 504?

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Question 194303This question is from textbook saxon algebra 2
: How many combinations of 6 volunteers can be selected from a group of 9 volunteers?
Is it 504? This question is from textbook saxon algebra 2

Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
nCr=n!/(n-r)!r!
9C6
=9!/(9-6)!6!
=9*8*7*6!/(3*2)*6!
=9*8*7/6
=84
.
Ed