If the variance of the frequency distribution is $160$ , then the value of $\mathrm{c} \in \mathrm{N}$ is

$X$ $c$ $2c$ $3c$ $4c$ $5c$ $6c$
$f$ $2$ $1$ $1$ $1$ $1$ $1$

  • [JEE MAIN 2024]
  • A

    $5$

  • B

    $8$

  • C

    $7$

  • D

    $6$

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