If the coefficient of variation of two series are 75% and 90% and their standard deviation 15 and 18, then their mean is

The coefficient of variation of two series are 70 and 90 and their standard deviation are 17.5 and 18 respectively.The mean of two series are

If the coefficient of variation of some observation is 60 and their standard deviation is 20, then their mean is

Coefficient of variation of two distributions are 60% and 70% and their standard deviations are 21 and 16 respectively. What are their arithmetic means?

Coefficient of variation of two distributions are 60% and 70% and their standard deviations are 21 and 16 respectively. What are their arithmetic means?

Coefficent of variation of two distributions are 60% and 75%, and their standard deviations are 18 and 15 respectively. Find their arithmetic means.

Coefficent of variation of two distributions are 60% and 75%, and their standard deviations are 18 and 15 respectively. Find their arithmetic means.

If the mean and coefficient of variation of a data are 4 and 87.5 % then the standard deviation is