Page 121 - Probability Demystified

110 CHAPTER 6 The Counting Rules

2. The value of 0! is
a. 0
b. 1
c. 10
d. 100

3. The value of 8 P 3 is
a. 120
b. 256
c. 336
d. 432

4. The value of 5 C 2 is
a. 10
b. 12
c. 120
d. 324

5. The number of 3-digit telephone area codes that can be made if
repetitions are not allowed is
a. 100
b. 720
c. 1000
d. 504
6. In how many different ways can a person select one book from
3 novels, one book from 5 biographies and one book from 7 self-
help books.
a. 15
b. 105
c. 3
d. 22

7. In how many ways can 7 different calculators be displayed in a row on
a shelf ?
a. 7
b. 49
c. 823,543
d. 5,040