SOLUTION: At a used book sale, 100 books are adult books and 160 books are children's books. Seventy of the adult books are nonfiction while 60 of the children's books are nonfiction. If
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-> SOLUTION: At a used book sale, 100 books are adult books and 160 books are children's books. Seventy of the adult books are nonfiction while 60 of the children's books are nonfiction. If
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Question 328028: At a used book sale, 100 books are adult books and 160 books are children's books. Seventy of the adult books are nonfiction while 60 of the children's books are nonfiction. If a book is selected at random, find the probability of selecting the following
a. fiction
b. not a children's nonfiction
c. an adult book or a children's nonfiction Answer by solver91311(24713) (Show Source):
The probability of anything is the number of ways that it can happen that you would consider a success divided by the number of ways it can happen total -- successes and failures.
There are 100 adult books and 160 children's books, hence there are 260 total books. That is your denominator.
The numerators are:
1. (The number of adult books minus the number of adult non-fiction) + (the number of children's books minus the number of children's non-fiction)
2. The total number of books (260) minus the number of children's non-fiction.
3. The number of adult books plus the number of children's non-fiction.
