4.2 Check Up - The Addition Rules for Probability

In a fish tank, there are 23 goldfish, 4 angelfish, and 9 guppies. If a fish is selected at random, find the probability that it is an angelfish or a guppy.

• 3/4

• 13/36

• 8/9

• 23/26

A single card is drawn from a deck. Find the probability of selecting a heart or a 9.

• 9/52

• 1/4

• 4/13

• 17/52

If a single card is drawn from an ordinary deck of cards, what is the probability of drawing a jack, queen, king, or ace?

• 17/52

• 4/13

• 9/26

• 5/13

An apartment building has the following distribution of apartments below. If an apartment is selected at random, what is the probability that it is on the 2nd floor or has 2 bedrooms?

• 8/11

• 6/11

• 14/17

• 11/17

A media rental store rented the following number of movie titles in each of these categories: 170 horror, 230 drama, 120 mystery, 310 romance, and 150 comedy. If a person selects a movie to rent, find the probability that it is a romance or a comedy.

• 17/49

• 23/49

• 3/7

• 4/7

The probability that a given tourist goes to the amusement park is 0.47, and the probability that she goes to the water park is 0.58. If the probability that she goes to either the water park or the amusement park is 0.95, what is the probability that she visits both of the parks on vacation?

• 0.10 or 10%

• 0.20 or 20%

• 0.12 or 12%

• 0.17 or 17%

A single card is drawn from a deck. Find the probability of selecting a 4 or a diamond.

• 5/13

• 7/13

• 4/13

• 9/13

A single card is drawn from a deck. Find the probability of selecting a club or a diamond.

• 4/13

• 1/2

• 3/4

• 6/13

A single card is drawn from a deck. Find the probability of selecting a jack or a black card.

• 7/13

• 8/13

• 3/7

• 5/7

At a used-book sale, 100 books are adult books and 160 are children’s books. Of the adult books, 70 are nonfiction while 60 of the children’s books are nonfiction. If a book is selected at random, find the probability that it is fiction.

• 0.52

• 0.57

• 0.48

• 0.50