Mean
Find the arithmetic average of this data set: 5, 9, 10.
8
The mean of 10 numbers is 12. Find the sum of these numbers.
120
The mean of the 15 numbers is 12. Find the sum of these numbers.
180
Find the arithmetic average (mean) of this data set: 11, 14, 20.
15
Maria worked 10 hours on Friday, 12 hours on Saturday and 300 minutes on Sunday. What was the average number of hours she worked on those 3 days?
9
Ahmet worked 3 hours on Friday, 10 hours on Saturday and 300 minutes on Sunday. What was the average number of hours she worked on those 3 days?
6
Defne worked 7 hours on Friday, 11 hours on Saturday and 180 minutes on Sunday. What was the average number of hours she worked on those 3 days?
7
The mean of the 12 numbers is 12. Find the sum of these numbers.
144
I played 4 video games and had an average score of 12,000 points. The average score of the first 3 games was 11,000 points. How many points did I score in the 4th game?
15,000
Zeynep has the following data: 15,n, 84, 3, 9.
If the mean is 24, what could n be?
9
Levent has the following data: 20,n,14,13,9.
If the mean is 18, what could n be?
34
I played 4 video games and had an average score of 160 points. The average score of the first 3 games was 150 points. How many points did I score in the 4th game?
190
Jenny bought 4 books in a bookstore. The prices of the first 3 books were $16, $18 and $19. The average price she paid for the 4 books was $18. How much did she pay for the 4th book?
19
Four numbers have an arithmetic average as 35. If three of the numbers are, 45, 20, 50. Find the fourth number.
25
Four numbers have an arithmetic average as 30. If three of the numbers are, 30, 20, 50. Find the fourth number.
20
Four numbers have an arithmetic average as 40. If three of the numbers are, 30, 20, 50. Find the fourth number.
60