There are 10 boys and 20 girls in a class. In a class test, the mean score of the boys is 77. The mean score of the girls is 80. What is the mean score of the whole class?

To calculate the mean of the whole class:1) Find the sum of the individual scores of the whole class. Boys: 10 x 77 = 770Girls: 20 x 80 = 1600Total of Boys and Girls: 770 + 1600 = 23702) Divide the sum of the individual scores by the total number of students in the class.Sum of individual scores = 2370Total number of students: 10 + 20 = 302370/30 = 79The mean of the whole class is 79.

Answered by Anuj M. Maths tutor

5756 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How do I find the equation of a straight line from a graph?


Factorise x² + 6x + 8


What is 64^1/2 equal to?


Write (x-2)(x+4)=10 in the form ax^2 + bx + c = 0 and work out the values of a, b and c


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences