the percentage of marks obtained by 12 students of a class in mathematics are 56 ,44, 47, 23,0, 19, 81, 93, 72, 35, 1 and 3. find the mean marks.
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Given that 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
No. of students =12
We know mean =
No. of observations(students)
sum of observations(marks of student)
=
12
64+36+47+23+0+19+81+93+72+35+3+1
=
12
474
Mean=39.5.
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