If A - a - b - c then the number of proper subsets of A are-A- 3B- 6C- 10D- 8

The correct option is B 6 There are 2n 2 proper subsets for every set of n elements. So power set of A = 23 2 = 6 ...

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Combination with Restrictions

If A = a , b ...

Question

If A = {a, b, c} then the number of proper subsets of A are:

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