$\{x : x$ is a prime number, $x < 15\}$ in roster form is

$\{x : x$ is a prime number, $x < 15\}$ in roster form is
  1. $\{2, 3, 5, 7, 11, 13\}$
  2. $\{1, 2, 3, 5, 7, 11, 13\}$
  3. $\{2, 3, 5, 7, 9, 11, 13\}$
  4. $\{3, 5, 7, 11, 13\}$

Solution

Primes less than $15$: $2, 3, 5, 7, 11, 13$. ($1$ is not prime; $9 = 3 \times 3$ is composite.)

Asked in: MH-SSC-9

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