Q) At a used-book sale, 100 books are adult books and 160 are children's books. Of the adult books, 70 are nonfictions while 60 of the children's books are nonfiction.
A book is selected at random.
i) What is the probability that the selected book is an adult book or a fiction book?
ii) Are the events
A : ‘selecting an adult book' and
B : ‘selecting a fiction book' independent events?