Question

If mean and geometric mean of 10 observations are 12 and 9 then find variance

Answer 1

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Answer 2

The variance is 6 .

Explanation:

If we have given the mean and geometric mean of n observations , then the variance is given by :-

$V = 2(A-G)$

, where A = Mean

G = geometric mean

As per given , we have

A= 12

G= 9

Substitute all theses values in the formula , we get

$V = 2(12-9)$

$V = 2(3)=6$

Therefore , the value of variance is 6 .

# Learn more :

Find mean and variance of the set of observations 3, 5, 7, 9, 11.​

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