- #1

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## Homework Statement

Solve for

*n*.

[tex]11_{C}_n=330[/tex]

## Homework Equations

[tex]n_{C}_r=\frac{n!}{(n-r)!r!}[/tex]

Sorry if the combination formula looks bad. I don't know how to write the comb. formula with Latex.

## The Attempt at a Solution

I solved for

*n*as far as [tex]n!(11-n)!=133056[/tex] How do I go further with this? The answers are 4 or 7.