SOLUTION: in a math class of 21 students the average score on the most recent test was 77%. if sarahs grade was 95% and jacks grade was 78% find the average grade of the remaining 19 student

Question 1000802: in a math class of 21 students the average score on the most recent test was 77%. if sarahs grade was 95% and jacks grade was 78% find the average grade of the remaining 19 students
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
in a math class of 21 students the average score on the most recent test was 77%. if sarahs grade was 95% and jacks grade was 78% find the average grade of the remaining 19 students
---------
(78 + 95 + 19x)/21 = 77
--------
(173 + 19x)/21 = 77
--------
173 + 19x = 1617
---
x = 76%
--------
Cheers,
Stan H.
-----------
RELATED QUESTIONS
In a class of 21 students the average score on a math test was 77%. If Suzie Smart got... (answered by stanbon)

A teacher has two math classes. In one class there are 80 students and the average grade... (answered by dfrazzetto,stanbon)

In a math class with 20 students, the grades on a recent quiz ranged from 0 to 10,... (answered by LinnW)

Three students were absent when the remaining 21 students in the class took a test on... (answered by ewatrrr)

Ms. Norwalk's math class took the same test as Mr. Ellsworth's students. Ms.Norwalk's... (answered by richwmiller)

Twenty students in a chemistry class took a test on which the overall average score was... (answered by ewatrrr)

Twelve students took a math exam and obtained an average score of 80%. If four students... (answered by josmiceli,greenestamps,josgarithmetic)

The average (arithmetic mean) grade of 2 students on a geometry quiz was 82. The average... (answered by ikleyn)