In a recent year, about two-thirds of U.S. households purchased ground coffee. Consider the annual ground coffee expenditures for households purchasing ground coffee, assuming that these expenditures are approximately distributed as a normal random variable with a mean of $65.16 and a standard deviation of $10.00.
A. Find the probability that a household spent less than $35.00
B. Find the probability that a household spend more than $60.00
C. What proportion of the households spent between $40.00 and $50.00?
D. 99% of the households spent less than what amount?