Homework Help: Math

Posted by David on Thursday, January 29, 2009 at 6:09pm.

You have a mean score of 86 on 9 quizzes. The teacher decides to drop your lowest quiz score to determine your final quiz mean. After dropping the lowest score, your mean score on the 8 remaining quizzes is 88. What score was dropped?

Math - Reiny, Thursday, January 29, 2009 at 6:51pm
let the score that was dropped be x

total of all the marks on 9 quizzes = 86*9 = 774
then (774-x)/8 = 88
solve for x

(hope you get 70)
Math - Damon, Thursday, January 29, 2009 at 6:53pm
sum/9 = 86
sum = 9*86 = 774
(sum - x)/8 = 88
sum - x = 704
774 - x = 704
x = 774 - 704
x = 70

Answer this Question

Related Questions

math - Tim wants his mean (average) quiz score in history class to be 90. His ...
math - STATISTICS The mean score for samantha's first s algebra quizzes was ...
algebra - Use the five steps for problem solving to answer the following ...
Math - John has scores of 88,73,90,85,93 on five math quizzes. What scores must ...
math - A teacher allows the students to each "throw out" their lowest ...
Math - An instructor gives regular 20-point quizzes and 100-point exams in a ...
algebra - each week, mandy's algebra teacher gives a 10 point math quiz. ...
Math - a group of 100 students took a quiz. Their average score was 76 points. ...
math - A math teacher calculates grades as follows:Grade=[2 test averages+quiz ...
math - A professor grades students on three tests, four quizzes, and a final ...

For Further Reading

First Name:
School Subject:
Answer: