Question

The mathematics department of a college has 12 male professors, 10 female professors, 11 male teaching assistants, and 6 female teaching assistants. If a person is selected at random from the group, find the probability that the selected person is a teaching assistant or a female

Answer 1

16 out of a 23 percent for all the females

Answer 2

12 male professors
10 female professors
11 male teaching assitants
6 female teaching assitants
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39 persons

[17 teaching assistants +  10 female non teaching assistant] /39 persons = 27/39 = 9/13

Answer: 9/13