Prevalence of Alzheimer's disease (Case per 100 population)
Age group males females
65- 69 1.6 0.0
70-74 0.0 2.2
75-79 4.9 2.3
80-84 8.6 7.8
85 + 35.0 27.9
Suppose an unrelated 77-year old man, 76 - year old woman, and 82- year old woman are selected from a community.
What is the probability that all three of these individuals have Alzheimer's disease?