Choosing a Book
Mark wants to buy exactly one book. He loves science fiction, mystery, and horror equally, and he cannot decide which type of book to choose. He is sure that he will like any book in any of those genres. To make things easier, he puts all of the books into a large box so he can't see them. If there are 12 science fiction books, 26 mystery books, and 8 horror books, what is the probability that Mark will select a science fiction book from the box?