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Question

Find the median of the following:
38, 46, 64, 87, 41, 58, 77, 35, 90, 25, 92, 33, 91. If 58 is replaced by 97 and 35 by 23, find the new median

A
57, 66
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B
58, 64
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C
Data insufficient
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D
None of these
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Solution

The correct option is C 58, 64
By arranging the given data in increasing order, we get:
25,33,35,38,41,46,58,64,77,87,90,91,92
Total terms = 13
since, the middle most term is 7th.
value of median is 58
If 58 is replaced by 97 and 35 by 23 then given data becomes:
38,46,64,87,41,97,77,23,90,25,92,33,91
By arranging this new data in increasing order, we get:
23,25,33,38,41,46,64,77,87,90,91,92,97
since, the middle most term is 7th.= 64
new median is 64

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