If $A = \{1, 2\}$, the power set $P(A)$ has

If $A = \{1, 2\}$, the power set $P(A)$ has
  1. $4$ elements
  2. $2$ elements
  3. $3$ elements
  4. $1$ element

Solution

$2^{2} = 4$. $P(A) = \{\emptyset, \{1\}, \{2\}, \{1,2\}\}$.

Asked in: MH-SSC-9

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