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Mathematics 18 Online
OpenStudy (anonymous):

How many subsets with at least 2 elements does a set with 4 elements have?

jimthompson5910 (jim_thompson5910):

let's say we have this set: {a,b,c,d}

jimthompson5910 (jim_thompson5910):

what subsets are there if you can only have 2 elements?

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