Page 65 - Probability Demystified

54 CHAPTER 3 The Addition Rules

10. Two dice are rolled. What is the probability of getting doubles or a
sum of 10?

11
a.
18
2
b.
9
1
c.
4
11
d.
36
11. The probability that a family visits Safari Zoo is 0.65, and the prob-
ability that a family rides on the Mt. Pleasant Tourist Railroad is
0.55. The probability that a family does both is 0.43. Find the prob-
ability that the family visits the zoo or the railroad.

a. 0.77

b. 0.22

c. 0.12

d. 0.10

12. If a card is drawn from a deck, what is the probability that it is a king,
queen, or an ace?

5
a.
13
7
b.
13
6
c.
13
3
d.
13