If the coefficient of variation of X-series is 14.6% and that of Y-series is 36.9% and their means are 101.2 and 101.25 respectively, find their standard deviation.

If the coefficient of variation of X-series is 14.6% and that of Y-series is 36.9% and their means are 101.2 and 101.25 respectively, find their standard deviation.