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CosmoK123456

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practice test help:

About 26% of orthopedic surgeries involves knee problems. The following table summarizes data collected from a sample of adults who have knee surgery. (Source: American Academy of Orthopedic Surgeons)

age, full knee replacement, no knee replacement

18-44,2, 9

45-64,25, 11

65-74,43,27

75-84, 27, 14

85-older,3, 2 1) What is the probability that an orthopedic surgical case selected at random involves

knee surgery?

2) What is the probability that a person from ages 18 – 44 who has knee surgery has a

full knee replacement?

3) What is the probability that a person from 45 – 64 who has knee surgery has a full

knee replacement?

4) What is the probability that a person who has knee surgery has a full knee

replacement?