In answering a question on a multiple-choice test, a student either knows the answer or guesses.Let p be the probability that the student knows the answer and 1-p be the probability that thestudent guesses. Suppose there are 5 multiple-choice alternatives so a student who guesses at theanswer will be correct with probability 1/5.(a) Show that the probability that a student knew the answer to a question given that he or sheanswered it correctly is 5p/(1+4p).(b) What is the probability that a student actually guessed the answer to a question given that heor she answered it correctly?

Let us define some events A : student knows the answer. B : student guess the answer. E : student…

Answered: In answering a question on a…

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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a quiz for a psychology class consists of ten questions, the questions are multiple choices with five possible answers each with only one correcct answer. if the student did not study and is guessing for all ten questions (x is the number of correct answers a students get correct) A- what is the probability of that student gettting one correct answer? B- what is the probability of that student getting a passing grade (70% or more correct is passing)
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