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Answer 1 · 2018-01-08T11:35:53

Median is #20#.

Mean is average of all data.

Mean of #{5,20,15,20,25}# is #a=(5+20+15+20+25)/5=17#

Median is central data of ascending or descending series of data.

If number of data is odd , then median is the central data and

if number of data is even , then median is the average of two

central data . Median of #{24,23,a,(a-1),12,26}# or

#{24,23,17,16,12,26} or {12,16,17,23,24,26}# is

#(17+23)/2=20#. Median is #20# [Ans]