The greek alphabet contains 24 letters. how many fraternity names with greek letters can be formed if each fraternity name contains 2 letters and repetition of letters is permitted?
48
552
576

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same