In a multiple choice exam, there are 6 questions and 4 choices for each question (a,b,c,d). Nancy has not studied for the exam at all and decided to randomly guess the answers. What is the probability that: a) the first question she gets right is question number 5? b) she gets all the questions right? c) she gets at least one question right?
In a multiple choice exam, there are 6 questions and 4 choices for each question (a,b,c,d). Nancy has not studied for the exam at all and decided to randomly guess the answers. What is the probability that: a) the first question she gets right is question number 5? b) she gets all the questions right? c) she gets at least one question right?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
In a multiple choice exam, there are 6 questions and 4 choices for each question (a,b,c,d). Nancy has not studied for the exam at all and decided to randomly guess the answers. What is the probability that:
a) the first question she gets right is question number 5?
b) she gets all the questions right?
c) she gets at least one question right?
Expert Solution
Step 1
Here the given information is
In a multiple choice exam, there are 6 questions and 4 choices for each question (a,b,c,d). Nancy has not studied for the exam at all and decided to randomly guess the answers.
i.e
n = 6 ( total number of questions)
And the total number of choices = 4
Then
P(correct answer) = 1/4 = 0.25
P(wrong answer) = (1-0.25) = 0.75
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