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OpenStudy (anonymous):
A set has n elements. How many possible subsets are there? EDIT: Reminder to myself to look at this link: http://math.stackexchange.com/questions/194779/how-many-subsets-are-there-in-a-set-of-size-n-no-combinatorics
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OpenStudy (anonymous):
2^n
jimthompson5910 (jim_thompson5910):
If a set has n elements, then there are \(\Large 2^n\) possible subsets.
OpenStudy (anonymous):
Why is it 2^n?
jimthompson5910 (jim_thompson5910):
This page has a few proofs about your question http://www.proofwiki.org/wiki/Cardinality_of_Power_Set
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