How many elements are there in the power set of a set containing n elements- (i)20 (ii) 2n (iii) n 2 (iv) none of these
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2n
Step-by-step explanation:
Number of Elements in Power Set –
As each element has two possibilities (present or absent}, possible subsets are 2×2×2.. n times = 2^n. Therefore, power set contains 2^n elements
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