Probability And Statistics Worksheets Page 32
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42P
L
9-1–L
9-6
RACTICE
ESSON
ESSON
A spinner with 8 equal sectors labeled A through H is spun. Find each probability.
(Lesson 9-1)
30. P(spinning E)
31. P(spinning vowel)
32. P(spinning H)
33. P(spinning a letter before F) 34. P(spinning B or G)
35. P(spinning M)
36. Describe a simulation you could do to find out how many cards you would
expect to have to draw from a standard deck to get three clubs. (Lesson 9-2)
For each situation, tell whether order does or does not matter. (Lesson 9-5)
37. You are selecting three-number combinations for school lockers.
38. You are selecting five books to check out from the library.
39. You are choosing the 9 starters on a baseball team.
40. You are choosing a 5-member committee from your leadership board.
Career – Physical Therapist
Workplace Knowhow
P
hysical therapists work with people who have been injured. They improve
mobility, relieve pain and prevent or limit permanent physical disabilities.
To relieve pain and treat injuries, physical therapists use massages, electrical
stimulation, hot and cold packs and traction. The sports world depends on
physical therapists to help athletes who are injured during practices, exercise
sessions or games. Some injuries require surgery, but many can be treated by rest
followed by proper exercise. Physical therapists often travel with teams.
1. As a physical therapist, you have treated 236 injuries during the past year. Of
the total number, 108 injuries were caused by an improper warm-up. What
percent of the injuries resulted from an improper warm-up?
2. A team of 45 players suffered 15 ankle injuries during the season. If the squad
is increased to 52 players, how many ankle injuries would you expect to see
during a season?
3. A physical therapist employs 4 kinds of massage, 3 kinds of baths, 1 type of
electrical stimulation, and 8 exercise programs. If each injury is treated with all
four types of therapies, how many combinations of therapies does this
therapist offer?
4. You are examining the player files for 30 players who have been injured during
the season. For this sport, 1 out of 3 injuries are to the knee and 1 out of 2 of
these cases require surgery. What is the probability that the first file you select
will belong to a player requiring knee surgery?
411
Chapter 9 Review and Practice Your Skills
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