SOLUTION: dear math teachers, this is a combinatoric question. if nC2=10C2 solve for the value of n.

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Question 668388: dear math teachers,
this is a combinatoric question. if nC2=10C2 solve for the value of n.
Found 2 solutions by lynnlo, Edwin McCravy:
Answer by lynnlo(4176)   (Show Source): You can put this solution on YOUR website!
n=10
Answer by Edwin McCravy(20054)   (Show Source): You can put this solution on YOUR website!
nC2=10C2

n = 10

Check by substititing 10 for n in

nC2=10C2

10C2=10C2

Both sides are the same so n=10 checks.

Edwin
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