Question:
The percentage marks obtained by students of a class in mathematics are as follows: 64, 36 , 47, 23, 0, 19, 81, 93, 72, 35, 3, 1 .Find their mean.
Solution:
The percentage marks obtained by students are 64, 36 , 47, 23, 0, 19, 81, 93, 72, 35, 3, 1
$\therefore$ Mean marks $=\frac{\text { Sum of marks }}{\text { Total numbers of marks }}$
$=\frac{64+36+47+23+0+19+81+93+72+35+3+1}{5}=39.5$
Mean Marks = 39.5
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