Question

The Median of the data set is 18.What number is missing?
12, 17,_, 21, 13,25,

Answer 1

15.

Explanation:

There are 6 ( even number) of values in the data so:-

the median is the mean of the 2 middle numbers.

Therefore, we have:

(x + 21)/2 = 18 where x is the missing number.

x + 21 = 2*18

x = 36 - 21 = 15.

Answer 2

= 15

Explanation:

21 + 15 = 36

36/2 = 18

Therefore, 15 is the missing number :33