Posted by marie on Tuesday, August 23, 2011 at 11:57am.
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)

m ath  Reiny, Tuesday, August 23, 2011 at 1:06pm
aren't you just choosing 18 from 100 ?
so C(100,18) = huge!!
(appr 3.066 x 10^19) 
m ath  Luis, Wednesday, November 11, 2015 at 10:52pm
nCr
100C18
=3.06645108E19
From a T183 calculator
Type
100, then MATH,CHOOSE PRB,then scroll
down to number 3.
Enter.