Find all the subsets of C = {x : x ∈ W, x ≤ 2} .
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C = {0, 1, 2}
If a set has n elements, the number of subsets = 2n.
Here, the set has 3 elements, the number of subsets = 23 = 2 x 2 x 2 = 8.
Subsets of B are ϕ, {0}, {1}, {2}, {0, 1}, {0, 2}, {1, 2}, {0, 1, 2}.
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(iii) number of its subsets
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