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The percentage of marks obtained by stud...

The percentage of marks obtained by students of a class in mathematics are: 64, 36, 47, 23, 0, 19, 81, 93, 72, 35, 3, 1. Find their mean.

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Percentage of marks obtained by students : `64, 36, 47, 23, 0, 19, 81, 93, 72, 35, 3, 1`
Mean= Sum of Observations/No. of observations
Mean`=(64+36+47+23+0+19+81+93+72+35+3+1)/12`
`=474/12=39.5`
∴ Mean=`39.5` ​
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