There are 10 boys and 20 girls in a class. The mean mark for the class is 60, the mean mark for the girls is 54. Work out the mean mark for the boys.

Answer: The boys mean mark is 72.Explanation:Start by writing down all the information given in the question: (number of boys = 10, number of girls = 20, girls mean = 54, class mean = 60)Then have a think about anything else you might know that isn't explicitly stated: (mean = sum of all marks/total number of marks)Then create equations for the girls mean, class mean and boys mean using the information given and rearrange to solve for the boys mean (Easier to explain by working through than in words)

VB
Answered by Verity B. Maths tutor

10286 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

If f(x) = 5 – x and g(x) = 3x + 7, simplify f(2x) + g(x – 1)


Expand (x+2)^2


There are n sweets in a bag, 6 of which are orange. If the probablility of eating 2 orange sweets from the bag, one after the other, is 1/3, show that n^2 - n - 90 = 0. State any assumptions made.


A t-shirt is in the sale section of a store. It has 20% off and the new sale price is £12. What was the original price of the t-shirt?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning