For this problem, assume that you are to pick 3 cars from the motor pool, which contains 7 subcompact cars, 4 compact cars, and 9 midsize cars. how many ways can you pick the cars so not all are the same size?

Suppose that prices of a gallon of milk at various stores in one town have a mean of $3.71 with a standard deviation of $0.10. using chebyshev's theorem, what is the minimum percentage of stores that sell a gallon of milk for between $3.41 and $4.01? round your answer to one decimal place.