SOLUTION: A class of 25 students took a math test. Ten students had an average of 88. The other students had an average of 76. What is the average of the whole class?

Algebra ->  Average -> SOLUTION: A class of 25 students took a math test. Ten students had an average of 88. The other students had an average of 76. What is the average of the whole class?       Log On


   

Question 945837: A class of 25 students took a math test. Ten students had an average of 88. The other students had an average of 76. What is the average of the whole class?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
group of ten, total score:
t = 88*10
t = 880
---
other group, size:
s = 25 - 10
s = 15
---
other group, total score:
f = 76*15
f = 1140
---
whole class average:
a = (t + f)/25
a = (880 + 1140)/25
(880 + 1140)/25
---
copy and paste the above expression in to this calculator:
http://sooeet.com/math/scientific-calculator.php
---
a = 80.8
---
Free algebra tutoring live chat:
http://sooeet.com/chat.php?gn=algebra
---
Solve and graph linear equations:
http://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations with quadratic formula:
http://sooeet.com/math/quadratic-formula-solver.php
---
Solve systems of linear equations up to 6-equations 6-variables:
http://sooeet.com/math/system-of-linear-equations-solver.php
---