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Proper Set

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Question

Find the number of subsets and the number of proper subsets of the following sets.
(i) $A = {13, 14, 15, 16, 17, 18}$
(ii) $B = {a, b, c, d, e, f, g}$
(iii) $X = {x : x \in W, x \notin N}$

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Solution

(i) $64, 63$
(ii) $128, 127$
(iii) $2, 1$

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