23-11-2022
Mathematics

contestada

Four friends have each ordered a different AoPS textbook. When they arrive in the same package, they are distributed at random, one book to each person.

(a) What is the probability that Ann gets Introduction to Counting & Probability?
(b) What is the probability that Ann gets Introduction to Counting & Probability and Beth does not get Introduction to Geometry?
(c) What is the probability that Ann gets Introduction to Counting & Probability and Beth does not get Introduction to Geometry and Caleb gets Introduction to Algebra?

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