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To calculate the mean, you add all the numbers you are given together, and divide by the number of numbers that you have been given. For example, if you're asked to calculate the mean of 3, 4, 5, 6, 7, 9, 12, 18:

Add them together (64)

There are 8 numbers, so divide by 8 (8)

So the mean of this series is 8.

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14y ago

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