Find the mean of first five multiples of 3.

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Solution

The first five multiples of 3 are 3, 6, 9, 12, and 15. They are 5 in numbers.

We have to find the mean of first five multiples of 3.

Remember the definition of mean of n values x₁, x₂… x_n is

Therefore the mean of first five multiples of 3 is

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