18. In a finance class, the final grade is based on three tests. Historically, the instructor tells the class that the joint probability of scoring "A"s on the first two tests is 0.5. A student assigns a probability of 0.8 that she will get an "A" on the first test. What is the probability that the student will score an "A" on the second test given that she scored an "A" on the first test?

18. In a finance class, the final grade is based on three tests. Historically, the instructor tells the class that the joint probability of scoring "A"s on the first two tests is 0.5. A student assigns a probability of 0.8 that she will get an "A" on the first test. What is the probability that the student will score an "A" on the second test given that she scored an "A" on the first test?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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18. In a finance class, the final grade is based on three tests. Historically, the instructor tells the class
that the joint probability of scoring "A"s on the first two tests is 0.5. A student assigns a
probability of 0.8 that she will get an "A" on the first test. What is the probability that the student
will score an "A" on the second test given that she scored an "A" on the first test?

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