Page 19 - Probability Demystified

8 CHAPTER 1 Basic Concepts

2. A single die is rolled. Find each probability:

a. The number shown on the face is a 2.
b. The number shown on the face is greater than 2.
c. The number shown on the face is less than 1.
d. The number shown on the face is odd.

3. A spinner for a child’s game has the numbers 1 through 9 evenly
spaced. If a child spins, find each probability:

a. The number is divisible by 3.
b. The number is greater than 7.
c. The number is an even number.

4. Two coins are tossed. Find each probability:

a. Getting two tails.
b. Getting at least one head.
c. Getting two heads.

5. The cards A˘,2 ,3¨,4˘,5¯, and 6¨ are shuffled and dealt face down
^
on a table. (Hearts and diamonds are red, and clubs and spades are
black.) If a person selects one card at random, find the probability that
the card is
a. The 4˘.
b. A red card.
c. A club.

6. A ball is selected at random from a bag containing a red ball, a
blue ball, a green ball, and a white ball. Find the probability
that the ball is
a. A blue ball.
b. A red or a blue ball.
c. A pink ball.

7. A letter is randomly selected from the word ‘‘computer.’’ Find the
probability that the letter is
a. A ‘‘t’’.
b. An ‘‘o’’ or an ‘‘m’’.
c. An ‘‘x’’.
d. A vowel.