Answer: 5-/5-10/-3
Explaination: just fill in the letter it corresponds to
Answer:
A
Step-by-step explanation:
I believe it is A If I remember correctly
First you have all ten books, but then every time after, you loose one because you can't put the same book in the group twice.
10 * 9 * 8 * 7 = 5040 groups
