1. If the average of data 3, 4, x, 4 is 5, then x =? 2 Just answer two questions, whatever

5x4=20
4+4+3=11
20-11=9

RELATED INFORMATIONS

1. The average of 8 numbers in a row is 2.1, the average of the first three numbers is 2.6, and the average of the last four numbers is 1.4?
2. The average of the known data 1, 2, X and 5 is 2.5, and the median and mode of this group of data are () A. 2 and 2b. 2 and 2.5c. 1 and 2
3. 3 / 1 of a number is 8 more than 4 / 1. What is the number? (formula)
4. 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
5. 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?
6. The average number of 3 / 8, 5 / 6, 5 / 8 and 1 / 6 is (), and the number greater than the average number is（ The average of 3 / 8, 5 / 6, 5 / 8 and 1 / 6 is (), and the number greater than the average is ()
7. 6,4,3,3 the average of the data is_____ The median is______ The mode is______ . 3, 1, 3, 2 are the average of the data_____ The median is______ The mode is______ . 1,2,3,4,5_______ The variance is_______ .
8. There is a group of numbers that are 5,8,2,4,5,9,5,4,10,12, the mode is () the median is () the average is ()
9. 4. What are the modes of 7.7, 8.4, 6.3, 7.0, 6.4, 7.0, 8.6 and 9.1______ The median is______ The average is______ ．
10. 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
11. If the average of 3, 6, 7, 1, 3, 6 and X is 4, what is x?
12. There are eight numbers in a row, their average is 9.3, the average of the first five numbers is 10.5, the average of the last four numbers is 11.3, so the sum of these eight numbers is___ The fifth number is___ ．
13. There are eight numbers in a row, and their average is 9.3. It is known that the first five numbers are 10.5, and the average of the last four numbers is 11.3? Come on. I'm going to class tomorrow Er There should be a process Come on I need it urgently
14. There are eight numbers in a row, and their average is 9.3. It is known that the average of the first five numbers is 10.5, and the average of the last four numbers is 11.3
15. There are eight numbers in a row, and their average is 9.3. It is known that the average of the first five numbers is 10.5, and the average of the last two numbers is 9.3. What is the sixth number?
16. There are eight numbers in a row, and their average is 9.3. It is known that the average of the first five numbers is 10.5, the average of the last four numbers is 8.3, and what is the fifth number To sum up the formula and the number
17. There are five numbers, the average of which is 7. If you change one of them to 9, the average of your five numbers is 8. What is the original number?
18. There are eight numbers, the average is 7.5, the first five numbers are 8.8, the last four numbers are 9.5, what is the fifth number That 7.5 is the average of those eight numbers
19. There are seven numbers. The average of the first four numbers is 8.5, and the average of the last four numbers is 10. The average of these seven numbers is 6.9. What is the fourth number?
20. A group of data is 10, 10, s. It is known that the mode and average of this group of data are equal, and the median of this group of data is ()