SOLUTION: How many doubles teams can a tennis coach make with a ten player squad?

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Question 103339: How many doubles teams can a tennis coach make with a ten player squad?
Answer by HyperBrain(694) About Me  (Show Source):
You can put this solution on YOUR website!
Always remember this formula:

nCr=n%21%2F%28n-r%29%21r%21
This is no. of COMBINATIONS that can me drawn from a set of n objects taken r at a time.
Going back to your problem,

Therefore the no. of doubles from a team of ten is 45!
_______________________-_____________------------HyperBrain!