The The mean of marks in statistics course of 100 students was 72. The mean of marks of boys was 75 while their number was 70. Find out the mean of the girls in the class.
mean of marks in statistics course of 100 students was 72. The mean of marks of boys was 75 while their number was 70. Find out the mean of the girls in the class.
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Answer:
The mean of marks in Statistics of 100 students in a class was 72. The mean
of marks of boys was 75, while their number was 70. Find out the mean marks of
girls in the class.
Answered by
2
Answer:
Mean marks of girls
=
Totalnumbersofgirls
Totalmarksofallstudents−Totalmarksofboys
=
30
100×72−75×70
=
30
7200−5250
=
30
1950
=65
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