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The mean of the numbers 3 5 7 is 5.
The arithmetic mean of a set of numbers is found by dividing the sum of all the numbers by how many numbers there are. In this case the arithmetic mean is: (8 + 7 + 7 + 5 + 3 + 2 + 2) / 7 ---> because there are 7 pieces of data. = 34 / 7 = 4.857 ( to 3 d.p.)
The numbers 3, 5, and 7 together have a range of 4 and a mean of 5.
6, 7 and 20.
The concept of a mean is simple. If you are looking at a series of 3 numbers, lets just say 2, 7, & 9, and you have to find the mean, here's how:Add up all of the numbers, (2+7+9=18)Divide by the number of numbers (In this case the number of numbers is 3, so you have to divide by 3. So 18 ÷ 3 = 6, so the mean is six.)