the marks obtained by 12 students in examination out of 50 are given below 18 ,35 ,2, 27 ,40 ,0, 21 ,33, 27 ,8 36,23 find the mean marks
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The mean of the given marks of 12 students is equal to 22.5 .
Mean = Sum of all the observation / Total number of observations
Observations =18 ,35 ,2, 27 ,40 ,0, 21 ,33, 27 ,8 36,23
Sum of all the marks obtained by the 12 students out of 50 = 270
Total No. Of observations = 12
Mean = sum of the marks out of 50 / total no. of students
=> 270/12
=> 22.5
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