Trista remembers to set her alarm clock 82% of the time. When she does remember to set her alarm clock, the probability that she will be late for school is 0.30. When she does not remember to set it, the probability that she will be late for school is 0.60. Trista was late today. What is the probability that she remembered to set her alarm?

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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Trista remembers to set her alarm clock 82% of the time. When she does remember to set her alarm clock, the probability that she will be late for school is 0.30. When she does not remember to set it, the probability that she will be late for school is 0.60. Trista was late today. What is the probability that she remembered to set her alarm?

 

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