Answers

2016-03-14T16:44:12+05:30
Given numbers are 9,21,15,13.

After arranging in ascending order, the sequence obtained is as follows:

9, 13, 15, 21.

Since the number of terms are 4, and 4 is an even number, 

∴ median= average of n/2 and n/2+1 observations.

(where n is the total number of observations or terms)

∴ median= (13+15)/2

Median= 14

Hope it helps :)


Good day!

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2016-03-14T16:51:07+05:30
Here ...first arranging them in ascending order..9,13,15,21
then (n/2)term +(n/2+1) term /2
(4/2) term+(4/2+1) term/2
2term+3term/2
13+15/2
28/2
14
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