Find the median of the following data.
{:(x,12,15,18,21,24),(f,4,7,2,3,4):}

Options

A. 12
B. 16
C. 18
D. 15

Answer

`D`

Explanation

`{:(x,f,"Cumulative frequency"),(12,4," "14),(15,7," "11),(18,2," "13),(21,3," "16),(24,4," "20):}`
N=20
The value of x corresponding to `(N)/(2)`th value class in the cumlative frequency is the median. Here `(N)/(2) = 10` and the corresponding x value is median, i.e., 15.