The "coefficient of variation" is defined to be the standard deviation divided by the mean. It is what we use when we say something like "cars weigh 2000 pounds, plus or minus 15%"the 15% is the coefficient of variation. Recall that the standard deviation is the square-root of the variance.

1. Let V be a Binomial random variable with n=1000,p=0.1; what is the coefficient of variation?
2. Let Y be a Pascal random variable with r=2, p=.1. What is its coefficient of variation?