in Quantitative Aptitude edited by
206 views
0 votes
0 votes

Three math classes; $\text{X, Y},$ and $\text{Z},$ take an algebra test.

  • The average score in class $\text{X}$ is $83.$
  • The average score in class $\text{Y}$ is $76.$
  • The average score in class $\text{Z}$ is $85.$
  • The average score of all students in classes $\text{X}$ and $\text{Y}$ together is $79.$
  • The average score of all students in classes $\text{Y}$ and $\text{Z}$ together is $81.$

What is the average for all three classes?

  1. $81$
  2. $81.5$
  3. $82$
  4. $84.5$
in Quantitative Aptitude edited by
13.4k points
206 views

Please log in or register to answer this question.

Related questions

Quick search syntax
tags tag:apple
author user:martin
title title:apple
content content:apple
exclude -tag:apple
force match +apple
views views:100
score score:10
answers answers:2
is accepted isaccepted:true
is closed isclosed:true