Answers

2014-08-18T20:35:51+05:30
Avg marks of 30 students = 30
So sum of marks of all the students = 900

Avg marks of 45 students = 45
So sum of marks of all the students = 2025

Avg marks of 52 students = 41
So sum of marks of all the students = 2132

Thus,
Total Students = 127
Total Marks = 5057

So,
Avg Marks = 5057 / 127 = 39.8188976

Answer
39.8188976
0
2014-08-18T21:24:11+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.

Average of all sections =  total marks in all sections / total number of students
           = [ 30 * 30 + 45 * 45 + 52 * 41 ] / [30 + 45 + 52 ]
           = 39.82    rounded to 2nd decimal place
1 5 1