Poll Question 8.8 Example: A multiple choice test has 150 questions. Each question has three possible answers. (a) Find the probability that a student will get at least 56 answers right simply by guessing. (b) Find the probability that the student will get a "B" on the test (i.e. at least 120 questions correct but less than 135).
Poll Question 8.8 Example: A multiple choice test has 150 questions. Each question has three possible answers. (a) Find the probability that a student will get at least 56 answers right simply by guessing. (b) Find the probability that the student will get a "B" on the test (i.e. at least 120 questions correct but less than 135).
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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Transcribed Image Text:Poll Question 8.8
Example: A multiple choice test has 150 questions. Each question has three
possible answers.
(a) Find the probability that a student will get at least 56 answers right simply
by guessing.
(b) Find the probability that the student will get a "B" on the test (i.e. at least
120 questions correct but less than 135).
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