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Exercise 2

Avg difficulty 2.5

A professor gave a test to students in a science class and in a math class during the same week. The grades are summarized below.

	A	B	C	Total
Science Class	7	18	13	38
Math Class	10	8	9	27
Total	17	26	22	65

If one student was chosen at random, find each probability:

P(in the math class)
P(earned a B)
P(earned an A and was in the math class)
P(earned a B given the student was in the science class)
P(is in the math class given that the student earned a B)

Lee et al., Math in Society, Probability — Chapter 4 Review, Exercise 2

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