Hello, Kradano!

1) From a group of 9 novels, 7 history books, and 4 self-help books:

A) In how many different ways can 4 books be chosen so that:

2 of them are novels and 2 of them are history books?

There are: . ways to choose two Novels.

There are: . ways to choose two History books.

Therefore, there are: .

B) In how many different ways can 5 books be chosen so that:

there are either 0 or 1 novels ?

To have 0 Novels, we choose 5 from the other 11 books.

. . There are: . ways.

To have 1 Novel, we choose 1 Novel from the 9 Novels and 4 from the other 11 books.

. . There are: . ways.

Therefore, there are: .

C) If 5 books are chosen at random, what is the probability that

at least one of each type is chosen?

I'm still working on this part . . .