Question 657361
<pre>
That's 11 things taken 3 at a time.

The combinations of 11 things taken 3 at a time is 

C(11,3) = {{{(11*10*9)/(3*2*1)}}} = 165

You can also get that on a TI-84

Press ON
Press CLEAR
Press 1
Press 1
Press MATH
Press the left arrow key
Press 3
Press 3
Press ENTER

You'll see this: 

     11 nCr 3 
                   165

Edwin</pre>