ity theory is taking a multiple-choice test. ior a particular question on the test the fraction of examinees who know the answer is 0.7; 0.3 is the fraction that will guess. The probability of answering a question correctly is 1 for an examinee who knows the answer and 1/3 for a guessee. (The number of multiplechoice alternatives is 3). (1) Compute the probability that a randomly selected examinee answers the question correctly. (2) Compute the probability that an examinee knew the answer to the question given that he or she has correctly answered it.

ity theory is taking a multiple-choice test. ior a particular question on the test the fraction of examinees who know the answer is 0.7; 0.3 is the fraction that will guess. The probability of answering a question correctly is 1 for an examinee who knows the answer and 1/3 for a guessee. (The number of multiplechoice alternatives is 3). (1) Compute the probability that a randomly selected examinee answers the question correctly. (2) Compute the probability that an examinee knew the answer to the question given that he or she has correctly answered it.

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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