How many elements has P(A), ifA = ? - Vidyadip

Question

How many elements has P(A), if$A = \phi $?

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Answer

Number of elements in $\operatorname{set} \mathrm{A}=0$
Number of subsets of $\operatorname{set} A=2^0=1$
Hence number of element of $P(A)$ is 1

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