Suppose that a course has 3 sections with 50, 70, and 80 students. Let's say we randomly pick one of the 3 sections, and give all of their students a spooky costume. What's the expected number of costumes we'd give out?

Suppose that a course has 3 sections with 50, 70, and 80 students. Let's say we randomly pick one of the 3 sections, and give all of their students a spooky costume. What's the expected number of costumes we'd give out?

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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Suppose that a course has 3 sections with 50, 70, and 80 students.

Let's say we randomly pick one of the 3 sections, and give all of their students a spooky costume. What's the expected number of
costumes we'd give out?

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