Question

If the coefficient of variation and standard deviation of a distribution are 2 and 0.4 respectively, then mean of the distribution is:

• A. 40
• B. 20
• C. 10
• D. 8

Answer 1

The correct option is B 20

$C.V=2;\sigma =0.4\left(given\right)C.V=100\times \frac{s.d}{mean}2=\frac{100\times 0.4}{mean}Mean=\frac{40}{2}=20$