Mathematics · 2014
JEE Main · 12 April 2014, Shift 1 · Q86
Let X̄ and M.D. be the mean and the mean deviation about X̄ of n observations x_i^′, i=1,2, ….. n. If each of the observations is increased by 5,…
Let $\displaystyle \bar{X}$ and M.D. be the mean and the mean deviation about $\displaystyle \bar{X}$ of n observations $\displaystyle x_{i^{\prime}}, i=1,2, \ldots . . \mathrm{n}$. If each of the observations is increased by $\displaystyle 5$, then the new mean and the mean deviation about the new mean, respectively, are :
Official answer
(2)
$$\bar{X}+5, \text { M.D. }$$
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JEE Main 2014 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.