Register
The mean of Holly's first six math quiz scores was 75%. After taking the seventh quiz, her mean score rose to 77%. What was Holly's score on the seventh math quiz?
154k views
3 votes
The mean of Holly's first six math quiz scores was 75%. After taking the seventh quiz, her

mean score rose to 77%. What was Holly's score on the seventh math quiz?

User Rahul Chaudhary
by
3.0k points

1 Answer

5 votes
The total of her first six quizzes is 75*6 = 450

Let her seventh score be x
The total of her seven quizzes be 450+x

Then, (450+x)/7 = 77
x = (77*7) - 450 = 89

Her seventh score is 89
x =
User Tom Morgan
by
3.9k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

3.6m questions

4.6m answers

Other Questions

A study was completed in Florida. In southern Florida, the study involved 3,000 patients; 54% of them experienced flulike symptoms during the same month. The study had a margin of error of 1.8%. What does
Solve for x in the equation 3 x squared minus 18 x + 5 = 47. (I need this to be an answer like X=3+\_ square root 23)
Can someone help me plz I have to Turn 27/9 in simplest
The sanchez family goes out for dinner, and the price of the meals is $60. The sales tax on the Meals is 7 percent, and they also want to leave a 15 percent tip. What is the total cost of the meal? Analyze
Simplify: 10 ÷ [(5 + 2) − 5]
Link Copied!