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 new set :
A
is increased by 2.
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B
is decreased by 2.
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C
is two times the original median.
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D
remains the same as that of the original set.
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Solution
The correct option is C remains the same as that of the original set. Given that number of observations is 9
Therefore median is (n+12)th value =102=5th value
Given that the largest 4 observations is increased by 2