In a federal prison, inmates can select to complete high school, take college courses, or do neither. The following survey results were obtained using ages of the inmates.

If a prisoner is selected at random, find these probabilities:
a. The prisoner does not take classes.
b. The prisoner is under 30 and is taking either a high school class or a college class.
c. The prisoner is over 30 and is taking either a high school class or a college class.

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High School Courses College Courses Neither Age Under 30 30 and over 53 450 367 107 32 32 27