SOLUTION: evaluate: 9C6 the 9 and 6 are small and to the bottom of the C.

Question 489923: evaluate: 9C6 the 9 and 6 are small and to the bottom of the C.

Found 2 solutions by stanbon, edjones:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
evaluate: 9C6 the 9 and 6 are small and to the bottom of the C.
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9C6 is the number of unique sets of 6 you can build me using 9 objects.
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Note: Each time you build a set of 6 you automatically build a set
of 3 objects that you not use. So 9C6 = 9C3
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9C3 = (9*8*7)/(1*2*3) = 84
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Cheers,
Stan H.
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Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
nCr=9C6=9!/((9-6)!*6!)
=9*8*7*6!/(6!*3*2)
=3*4*7
=84
.
Ed
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