1.

If =O={0} then the number of all possible subsets of O is __.A. 2B. 3C. 1D. 4

Answer» Correct Answer - A
If a set has n elements, then number of all possible subsets`=2^n`
Since O contains only one element
`rArr ` Number of subsets `=2^1=2`
Hence , the correct options is (d)


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