Mathematics
How many proper subsets in all are there of a set containing 3 elements?
Sets
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Answer
Number of elements (n) = 3.
Formula for number of proper subsets = 2n - 1
By replacing 'n' with 3, we get:
23 - 1 ⇒ 8 - 1 ⇒ 7
Hence, there are 7 proper subsets in all.
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