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Katie is averaging 8 test scores. She makes a mistake and divides the correct sum by 9, which yields an average of 80. What is Katie's correct average test score?

Katie is averaging 8 test scores. She makes a mistake and divides the correct sum by 9, which yields an average of 80. What is Katie's correct average test score?
asked 226k views
4 votes
Katie is averaging 8 test scores. She makes a mistake and divides the correct sum by 9, which yields an average of 80. What is Katie's correct average test score?

asked
User SharpEdge
by
8.6k points

2 Answers

5 votes

Answer:

90

Explanation: Total points: 9(80) = 720 points

720 points/ 8 scores = 90

answered
User Etienne Perot
by
8.5k points
6 votes
90%. multiply the decimal then divide
answered
User Wahkuna
by
8.1k points
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