Problem 9 of 25sta-009
On seven quizzes, Maya scored 7, 16, 5, 12, 7, 18 and 10 points. What is the sum of the range and the mode of her seven scores?
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Solution walkthrough1:27
- Put the scores in order on a number line: .
- The range is the largest value minus the smallest: .
- The mode is the value that appears most often. Only appears twice, so the mode is .
- Add the two results: range mode .
- Traps: uses the median, uses the largest score, and adds to get the range.