Let $\bar{X}$ and $M.D.$ be the mean and the mean deviation about $\bar{X}$ of $n$ observations $x_i,$ $i = 1, 2, \dots, n.$ If each of the observations is increased by $5,$ then the new mean and the mean deviation about the new mean,respectively,are

  • A
    $\bar{X}, M.D.$
  • B
    $\bar{X} + 5, M.D.$
  • C
    $\bar{X}, M.D. + 5$
  • D
    $\bar{X} + 5, M.D. + 5$

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