Abortion provider survey. The Alan Guttmacher Institute Abortion Provider Survey is a survey of all 358 known nonhospital abortion providers in the United States (Perspectives on Sexual and Reproductive Health, Jan./Feb. 2003). For one part of the survey, the 358 providers were classified according to case load (number of abortions performed per year) and whether they permit their patients to take the abortion drug misoprostol at home or require the patients to return to the abortion facility to receive the drug. The responses are summarized in the accompanying table. Suppose we select, at random, one of the 358 providers and observe the provider’s case load (fewer than 50, or 50 or more) and home use of the drug (yes or no).

Number of Abortions Permit Drug at Home Fewer than 50 50 or More Totals Yes 170 130 300 No 48 10 58 Totals 218 140 358 Based on Henshaw, S. K., and Finer, L. B. “The accessibility of abortion services in the United States, 2001.” Perspectives on Sexual and Reproductive Health, Vol. 35, No. 1, Jan./Feb. 2003 (Table 4).

a. Find the probability that the provider permits home use of the abortion drug.

b. Find the probability that the provider permits home use of the drug or has a case load of fewer than 50 abortions.

c. Find the probability that the provider permits home use of the drug and has a case load of fewer than 50 abortions.