SOLUTION: Please solve: 10 C 3 Thank you. * the 10 and 3 of course are ment to be sub numbers

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Question 85469: Please solve:
10 C 3
Thank you.
* the 10 and 3 of course are ment to be sub numbers
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Using
nCr=n%21%2F%28n-r%29%21r%21

10C3=10%21%2F%2810-3%29%213%21 Plug in n=10, r=3

10C3=10%21%2F%287%29%213%21 Subtract

10%2A9%2A8%2A7%2A6%2A5%2A4%2A3%2A2%2A1%2F%287%2A6%2A5%2A4%2A3%2A2%2A1%29%283%2A2%2A1%29 Evaluate the factorials

Divide and cancel out like terms

10%2A9%2A8%2F%283%2A2%2A1%29

720%2F6 Multiply

120 Divide

So 10C3=120