what is a mean and how you do it
A mean is the average. To find the mean add the numbers together. Then divide.
For instance, to find the mean of 4, 8, and 9, you need to add those three numbers together and get 21. Divide 21 by 3 to get the mean -- 7.
To calculate the mean or average of a set of numbers, you need to follow these steps:
1. Add up all the numbers in the set.
In this case, you have the numbers 4, 8, and 9. By adding them together, you get 4 + 8 + 9 = 21.
2. Count the number of items in the set.
In this example, there are three numbers: 4, 8, and 9.
3. Divide the sum of the numbers by the count of items.
Divide the sum (21) by the count (3) to get the mean: 21 ÷ 3 = 7.
Therefore, the mean of the set {4, 8, 9} is 7.