$\{x : x$ is a digit in the number $1234321\}$ in roster form is

$\{x : x$ is a digit in the number $1234321\}$ in roster form is
  1. $\{1, 2, 3, 4\}$
  2. $\{1, 2, 3, 4, 3, 2, 1\}$
  3. $\{1, 2, 3\}$
  4. $\{2, 3, 4\}$

Solution

Distinct digits in $1234321$: $1, 2, 3, 4$.

Asked in: MH-SSC-9

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