Each boy in a class has 7 pockets and each girl in that class has 11 pockets. how many boys and how many girls are there in this class if there are 147 pockets and 17 heads?

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.