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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?

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)
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?
Transcribed Image Text: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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