Back to Chapter 4 Review

Exercise 1

Avg difficulty 2.5

A professor gave a test to students in a morning class and the same test to the afternoon class. The grades are summarized below.

	A	B	C	Total
Morning Class	14	11	7	32
Afternoon Class	11	13	4	28
Total	25	24	11	60

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

P(in the afternoon class)
P(earned an A)
P(earned a B and was in the afternoon class)
P(earned a C given the student was in the morning class)
P(is in the morning class given that the student earned a B)

Lee et al., Math in Society, Probability — Chapter 4 Review, Exercise 1

AI Tutor

Adapted from Math in Society © 2018–2024 Portland Community College Math Instructors. Licensed under CC BY-SA 4.0. Source: Math in Society. Imported at revision 68ee43c.