Question

Seven math books and three literature books are on a shelf, how many ways can they be arranged if the books are kept together

Answer 1

This is the theory of combination.
The number of books in the shelf are:
math books=7
literature books=3
the number of ways they can be rearranged is given by the combination of the respective books on the shelf which is:
7C3
=210
thus we conclude that there are 210 ways in which the books can be enjoyed.