SOLUTION: Question: 70 students got an average score of 80, 30 students got an average score of 70. What is the average score of all students? Please explain how you calculate. thank you
Algebra.Com
Question 232294: Question: 70 students got an average score of 80, 30 students got an average score of 70. What is the average score of all students? Please explain how you calculate. thank you
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Question: 70 students got an average score of 80, 30 students got an average score of 70. What is the average score of all students? Please explain how you calculate.
-------------------
Average = total number of points/total number of students
----------------------
Total # of points = 70*80 + 30*70 =7700
Total # of students = 70 + 30 = 100
-----------------------------------------------
Average for all the students = 7700/100 = 77
===================================================
Cheers,
Stan H.
RELATED QUESTIONS
two classes of high school students take the same test . once class of 20 students had an (answered by Fombitz)
a total of 50 juniors and seniors were given a mathematics test. the 35 juniors attained... (answered by checkley71)
a total of 50 juniors and seniors were given a math test. 35 juniors contained an average (answered by Prithwis)
What is the average?
A total of 50 juniors and seniors were given a math test. The 35... (answered by richwmiller)
The average score for a class of 30 students was 75. The 20 male students in the class... (answered by ankor@dixie-net.com)
A total of 50 juniors and seniors were given a mathematics test. 35 juniors attained an... (answered by Theo)
A total of 50 juniors and seniors took a math test. The 35 juniors attained an average of (answered by solver91311)
I got an average score of 80 on two tests. What score must I get on the third test so... (answered by edjones)
On a certain test, a class with 10 students had an average score of 60 and a class with... (answered by checkley79)