SOLUTION: nC(r-1)=56 nCr=28 nC(r+1)=8 what is the value of r?

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Question 636761: nC(r-1)=56
nCr=28
nC(r+1)=8
what is the value of r?

Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 
Hi,
nC(r-1)=56
8C5 = 56 r = 6
and...
8C6 = 28 & 8C7 = 8
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