A class of 15 students is working on an in-class assignment. The students are split up into 5 groupsof 3, and asked to solve a probability problem. Each student (independently) has a 1/2 chance of knowing how to do the problem; however, if anyone in a group knows how to do the problem,everyone in the group gets it right. What is the expected number of students that get the problem right?

A class of 15 students is working on an in-class assignment. The students are split up into 5 groupsof 3, and asked to solve a probability problem. Each student (independently) has a 1/2 chance of knowing how to do the problem; however, if anyone in a group knows how to do the problem,everyone in the group gets it right. What is the expected number of students that get the problem right?

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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