6 numbers have an average of 20
If we take one away the average is 15.
What is the number
If we take one away the average is 15.
What is the number
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If 6 numbers have an average of 20, then we know that the sum of all the numbers is 120.
This because to find an average we use: Total of numbers/Number of numbers = Average
In this case it was: 120/6 = 20.
If we take the number away the average falls to 15.
So, it will now look like this: Total of numbers/Number of numbers = Average
? / 5 = 15
Rearrange the equation and we get 5 x 15 = 75
So, the answer is 120 - 75 = 45.
Hope this helped! :)
This because to find an average we use: Total of numbers/Number of numbers = Average
In this case it was: 120/6 = 20.
If we take the number away the average falls to 15.
So, it will now look like this: Total of numbers/Number of numbers = Average
? / 5 = 15
Rearrange the equation and we get 5 x 15 = 75
So, the answer is 120 - 75 = 45.
Hope this helped! :)