There are 16C6 = 16*15*14*13*12*11/(6*5*4*3*2*1) possible committees.
That is, 8,008 of them.
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72
There are 4845 ways to choose 4 people out of 20 20 choose 4 = 20! / (4!16!)
-5
The number of distinct, different 4-person committees that can be formedfrom a group of 32 people is(32!/28!) / (4!) = (32 x 31 x 30 x 29) / (4 x 3 x 2 x 1) = 35,960(but obviously, no more than four at a time.)
Possibilities are (9 x 8)/2 times (49 x 48 x 47 x 46)/24 = 366,121,728/48 =7,627,536 different committees.