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Multiple choice

If the mean deviation of the numbers $1$, $1+\mathrm{d}$, $1 +2\mathrm{d},\ \ldots$ , $1+100\mathrm{d}$ from their mean is $255$, then the $\mathrm{d}$ is equal to

  1. $10.0$
  2. $20.0$
  3. $10.1$
  4. $20.2$
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C Correct answer

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