The largest score in a distribution is 88 and the smallest is 14. you plan to construct a grouped distribution with 15 intervals. what will be the size of your class interval?

(statistics)

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?