Page 63 - Probability Demystified

52 CHAPTER 3 The Addition Rules

4. When a single die is rolled, what is the probability of getting a prime
number (2, 3, or 5)?
5
a.
6
2
b.
3
1
c.
2
1
d.
6

5. A storeowner plans to have his annual ‘‘Going Out of Business Sale.’’
If each month has an equal chance of being selected, find the prob-
ability that the sale will be in a month that begins with the letter
Jor M.

1
a.
4
1
b.
6
5
c.
8
5
d.
12

6. A card is selected from a deck of 52 cards. Find the probability that it
is a red queen or a black ace.

2
a.
13
1
b.
13
5
c.
13
8
d.
13