If $A=\{x / x$ is a prime number, $0 \leq x \leq 9]$, then the number of elements of power set of $A$ is

If $A=\{x / x$ is a prime number, $0 \leq x \leq 9]$, then the number of elements of power set of $A$ is
  1. 12
  2. 4
  3. 16
  4. 8

Solution

$\begin{aligned} A=\{2,3,5,7\} & \\ \text { Power set of } A &=2^{4} \\ &=16 . \end{aligned}$

Asked in: MHT CET 2020 (13 Oct Shift 2)

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