Question

The marks obtained by 7 students in a test are given below:
57, 77, 70, 52, 49, 47, 77.
Median =

• A. 77
• B. 57
• C. 52
• D. 49

Answer 1

The correct option is B 57

First we arrange the data set in ascending order:

47, 49, 52, 57, 70, 77, 77

Median is the middle most value of a given data set.
Number of observations = 7 (an odd number).
$\therefore$ Median = $(\frac{n+1}{2}{)}^{th}term.$
Here n = 7, $\Rightarrow \frac{8}{2}=4^{th}term$
$4^{th}$ term of the series = 57.
Thus, Median = 57.