student is given a test consisting of 18 multiple choice questions, each having 3 possible answers. The student didn't study, so he decides to answer every question at random. A. For one question, what is the probability that a student will answer it correctly if he has 3 possible answers and just answers it at random? B. What is the probability that out of 18 questions, he answers none right? C. What is the probaility that out of 18 questions, he answers one right?

student is given a test consisting of 18 multiple choice questions, each having 3 possible answers. The student didn't study, so he decides to answer every question at random. A. For one question, what is the probability that a student will answer it correctly if he has 3 possible answers and just answers it at random? B. What is the probability that out of 18 questions, he answers none right? C. What is the probaility that out of 18 questions, he answers one 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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