Question: Home modifications for wheelchair users. The American Journal of Public Health (Jan. 2002) reported on a study of elderly wheelchair users who live at home. A sample of 306 wheelchair users, age 65 or older, were surveyed about whether they had an injurious fall during the year and whether their home features any one of five structural

modifications: bathroom modifications, widened doorways/hallways, kitchen modifications, installed railings, and easy-open doors. The responses are summarized in the accompanying table. Suppose we select, at random, one of the 306 surveyed wheelchair users.

1. Find the probability that the wheelchair user had an injurious fall.
2. Find the probability that the wheelchair user had all five features installed in the home.
3. Find the probability that the wheelchair user had no falls and none of the features installed in the home.

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