math
posted by marie .
Use the formula nCr to solve
Of the 100 people in the U.S. senate, 18 served on the Foreign relations Committee. How many ways are there to select Senate members for this committee (assuming party affiliation is not a factor in the selection)

What didn't you like about my answer to your same question?
http://www.jiskha.com/display.cgi?id=1314115058 
I didn't understand the answer?

C(n,r) is the same as _{n}C_{r}
and is defined as
n!/(r!(nr)!)