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The median of a set of 9 distinct observations is 20.5. If each of the largest 4 observations of the set is increased by 2, then the median of the new set

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is decreased by 2

is two times the original median

remains the same as that of the original set

is increased by 2

answer is C.

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Detailed Solution

Median of 9 observations 20.5

Largest 4 observations increased by 2

$5^{th}$ term remains unchanged.

Median is $\frac{9 + 1}{2} = 5^{th}$ terms

Median $= 20.5$

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