<PRE><B>Question 668549</B>
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Since it apparently doesn&#39;t matter which order he works on the 7 problems he does select, you need the number of Combinations of 10 things taken 7 at a time.


*[tex \LARGE {{n}\choose{k}}] is the number of combinations of *[tex \Large n] things taken *[tex \Large k] at a time and is calculated by *[tex \Large \frac{n!}{k!(n\,-\,k)!}]


Plug in the numbers and do the arithmetic.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
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