In recent years, about two-thirds of US house holds 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 spent more than $60.00.
C. What proportion of households spent between $40.00 and $50.00.
D. 99% of households spent less than what amount?