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# Find the Mean and Variance for the First 10 Multiples of 3 - CBSE (Arts) Class 11 - Mathematics

ConceptVariance and Standard Deviation Standard Deviation

#### Question

Find the mean and variance for the first 10 multiples of 3

#### Solution

The first 10 multiples of 3 are

3, 6, 9, 12, 15, 18, 21, 24, 27, 30

Here, number of observations, = 10

 xi (X_i - barX) (X_i - barX)^2 3 -13.5 182.25 6 -10.5 110.25 9 -7.5 56.25 12 -4.5 20.25 15 -1.5 2.25 18 1.5 2.25 21 4.5 20.25 24 7.5 56.25 27 10.5 110.25 30 13.5 182.25 742.5

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#### APPEARS IN

Solution Find the Mean and Variance for the First 10 Multiples of 3 Concept: Variance and Standard Deviation - Standard Deviation.
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