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Question

If A={1,2,3}, then the numbers of subsets of set A is

A
24
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B
28
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C
8
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D
16
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Solution

The correct option is C 8
The set {1,2,3} has 8 subsets. The first subset would be the null or empty subset, which contains none of the numbers: {}.
The null set is a subset of every set. The other subsets would include some of the numbers in the set, but not all of them: {1},{2},{3},{1,2},{1,3},{2,3},{1,2,3}

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