Add the three numbers together and divide that total by three; [a+b+c]/3=avg
Chat with our AI personalities
If the only thing you're told is the average, there's no way to figure out what the individual numbers are. There are an infinite supply of groups of numbers that all have the same average. If you need to find the individual numbers, you need a lot more information besides just their average.
To get the simple average of a series of numbers, you add the numbers up and divide by however many numbers there were. For example, the average of 2, 3 and 4 is the sum of the numbers (which adds up to 9) divided by 3 (because there are three numbers). So the average is 9/3 = 3.
It average of 2 numbers is 9 then take 9 away from 12, so average of 3 numbers is now 9, with 3 'left over.' The 3 which is 'left over' divides among the three numbers by adding 1 to each of them, raising the new average to 10.
First 3 composite numbers: 4+6+8 = 18 and 18/3 = 6 which is the average number
Add all the numbers together. Then divide by how many numbers there were originally. That is the average.