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OpenStudy (anonymous):
If a set has three elements, how many subsets does it have?
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OpenStudy (anonymous):
2^3 = 8. Consider a set {a,b,c} The 8 subsets are { }, {a}, {b}, {c}, {a,b}, {a,c}, {b,c} and {a,b,c}. If a set has n elements, the number of subsets is 2^n.
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