Forty people each bought $2 lottery tickets. Three of these people won $5, two of them won $10, and one of them won $20. The total amount of money won is what percent of the total amount spent on the tickets.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?