In a school ,35 boys and 85girls appered in an examination . The mean marks of boys was found to be 40%,where as the mean marks of girls was 60% .Determine the average marks percentage of the school
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Mean marks of boys = 40
no. of boys = 35
sum of marks for boys = 35 × 40 = 1400
Mean marks of girls = 60
no. of girls = 85
sum of marks for girls = 85 × 60 = 5100
Now, total marks obtained by 120 students of the school = 1400 + 5100 = 6500
Average marks for the school =total marks of the students ÷ numbers of students
=6500/ 120 = 54.16
so, average marks % of the school = 54.16%
no. of boys = 35
sum of marks for boys = 35 × 40 = 1400
Mean marks of girls = 60
no. of girls = 85
sum of marks for girls = 85 × 60 = 5100
Now, total marks obtained by 120 students of the school = 1400 + 5100 = 6500
Average marks for the school =total marks of the students ÷ numbers of students
=6500/ 120 = 54.16
so, average marks % of the school = 54.16%
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