The mean of 12 numbers is 40. if each number is divided by 8 what will be the mean of the new number

Given, mean of 12 numbers = 40

Let the 12 numbers be, x1, x2, x3, ....., x12.

Now when each number is divided by 8, then new set of 12 numbers is:

So, new mean =

Hence, new mean = 5

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