The mean of the following marks for pupils in a certain class is 72.

      

The mean of the following marks for pupils in a certain class is 72.
66, 86, 63, 80, x, 79, 69, 85, 63, 88
What is the median mark?

A. 74
B. 70
C. 63
D. 41

  

Answers


Wilfred
The correct answer is [A]

Mean = 72
Total marks = mean x number of pupils
= 72 x 10 = 720
Value of x
X = 720-the total of the given marks
Total of the given marks
66 + 86 + 63 + 80 + 79 + 69 + 85 + 63 + 88 = 679
X= 720 -679 = 41
Median = The middle mark when the marks are arranged in ascending order
41, 63, 63, 66, 69, 79, 80, 85, 86, 88
1563439662060-q3918720191147.png
=74
Wilfykil answered the question on July 31, 2019 at 10:16


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