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Question

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

A
77
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B
57
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C
52
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D
49
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Solution

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).
Median = (n+12)th term.
Here n = 7, 82=4th term
4th term of the series = 57.
Thus, Median = 57.

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