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If standard deviation of a data is 40 and the coefficient of variation is 25600, then find the mean.

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in Mathematics - Class 11 by (789k points)
If standard deviation of a data is 40 and the coefficient of variation is 25600, then find the mean.

(a) 64

(b) 6.4

(c) 640

(d) 0.64

The question was posed to me during an internship interview.

The origin of the question is Statistics in portion Statistics of Mathematics – Class 11

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The correct choice is (b) 6.4

The explanation: Coefficient of Variance = (Standard Deviation/Mean) × 100

⇒ Mean = 25600/4000 = 6.4.

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