Question

In a school 85 boys and 35 girls appeared in an examination. The mean marks of the boys was found to be 40% whereas the mean marks of the girls was 60% . Determine the average marks percentage of the school. explain it properly

Answer 1

total marks scored by boys =
$85 \times 40 = 3400$
total marks scored by girls =
$35 \times 60 = 2100$
so total marks scored =5500
and total no. of student=120
the mean =
$\frac{5500}{120}$
I.e. 45.8333

Answer 2

Answer:

mean marks for 85 boys = 40%  

Sum of all the marks for the 86 boys = 40 x 85 = 3400%

mean marks for 35 girls = 60%

Sum of all the marks for the 35 girls = 60 x 35 = 2100%

Total number of students = 85 + 35 = 120 students

Total marks = 3400 + 2100 = 5500%

Average marks = 5500 ÷ 120 = 45.8%

Answer: The average percentage of the school is 45.8%