Determine whether the following situation is a permutation problem or a combination problem.
A locker contains 24 books. You select 15 books at random. How many different sets of books can you select?

Choose the correct answer below.
Combination
Permutation

Why do interests rates on loans to be lower in a weak economy than in a strong one

The table shows the webster family’s monthly expenses for the first three months of the year. they are $2,687.44, $2,613.09, and $2,808.64. what is the average monthly expenditure for all expenses?

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?