Mathematics · 2013
JEE Main · 9 April 2013, Shift 1 · Q81
The mean of a data set consisting of 20 observations is 40. If one observation 53 was wrongly recorded as 33, then the correct mean will be:
The mean of a data set consisting of $\displaystyle 20$ observations is 40. If one observation $\displaystyle 53$ was wrongly recorded as $\displaystyle 33$, then the correct mean will be :
Official answer
(1)
$\displaystyle 41$
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JEE Main 2013 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.