Posted by Coralia on Wednesday, October 1, 2008 at 8:13pm.
From what the problem says, you need to add 1/4 of the quiz average to 3/4 of the unknown to get the total test average.
I hope this helps. Thanks for asking.
Related Questions
math - A math teacher calculates grades as follows:Grade=[2 test averages+quiz ...
Math - An instructor gives regular 20-point quizzes and 100-point exams in a ...
Chemistry - If tests are worth 90% & quizzes 10%. What is my average is my ...
math - Tim wants his mean (average) quiz score in history class to be 90. His ...
Math - a group of 100 students took a quiz. Their average score was 76 points. ...
algebra - Use the five steps for problem solving to answer the following ...
algebra - please translate A student scored five points more on the second...
Math - The class average on a math quiz was 74 and the standard deviation was 6....
Prob and Stats - Einstein claims that his true average quiz score is 90. You ...
algebra - each week, mandy's algebra teacher gives a 10 point math quiz. ...
For Further Reading