I have one problem that I can't solve. I am thinking about it for a week.

I know the answer is 2( power 100) - 5051Quote:

How many subsets with more than two elements can take out from a set with 100 elements??

I don't know why substract 5051 ???

For 2 power 100 is I think because of two elements from 100 elements.

:confused: