table Identifies a group of children by one of four hair colors, and by type of hair
Table 3.22
|
HAIR TYPE |
BROWN |
BLOND |
BLACK |
RED |
TOTALS |
|
WAVY |
20 |
5 |
15 |
3 |
43 |
|
STRAIGHT |
80 |
15 |
65 |
12 |
172 |
|
TOTALS |
100 |
20 |
80 |
15 |
215 |
a. Complete the table.
b. What is the probability that a randomly selected child will have wavy hair? 43/215
c. What is the probability that a randomly selected child will have either brown or blond hair? 100+20=120/215
d. What is the probability that a randomly selected child will have wavy brown hair? 20/215
e. What is the probability that a randomly selected child will have red hair, given that he or she has straight hair? 12/172
f. If B is the event of a child having brown hair, find the probability of the complement of
B.
g. In words, what does the complement of B represent?
