The average number of five numbers is 9. If one of them is changed to 1, then the average number of the five numbers is 8. What is the changed number
9 × 5-8 × 5 = 45-40 = 51 + 5 = 6
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- 1. The average number of five numbers is 9. If one of them is changed to 1, then the average number of the five numbers is 8. What is the changed number
- 2. The average number of five numbers is 9. If one of them is changed to 1, then the average number of the five numbers is 8. What is the changed number
- 3. The average number of five numbers is 9. If one of them is changed to 1, then the average number of the five numbers is 8. What is the changed number
- 4. There are five numbers with an average of 7. If one of them is changed to 9, then the average of the five numbers is 8. What is the original number of changes
- 5. The average number of five numbers is 9. If one of them is changed to 1, then the average number of the five numbers is 8. What is the changed number
- 6. The average number of five numbers is 9. If one of them is changed to 1, then the average number of the five numbers is 8. What is the changed number
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- 15. There are five numbers, and their average is 2.8. After one number is removed, their average is 3.2. What is the number removed?
- 16. If the average of the first four numbers is 3.6 and the average of the last four numbers is 2.8, what is the average of the first number and the fifth number
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- 20. 1. If the average of data 3, 4, x, 4 is 5, then x =? 2 Just answer two questions, whatever