In answering a question on a multiple-choice test, a student either knows the answer or she guesses. Let p be the probability that she knows the answer and 1-p the probability that she gucsscs. Assumc that a studcnt who gucsscs at the answer will bc correct with probability 1/m, where m is the number of multiple-choice alternatives. What is the conditional probability that a student knew the answer to a question given that she answered it correctly?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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In answering a question on a multiple-choice test, a student either knows
the answer or she guesses. Let p be the probability that she knows the answer and 1-p
the probability that she gucsses. Assumc that a studcnt who gucsscs at the answer will be
correct with probability 1/m, where mis the number of multiple-choice alternatives. What
is the conditional probability that a student knew the answer to a question given that she
answered it correctly?
Transcribed Image Text:In answering a question on a multiple-choice test, a student either knows the answer or she guesses. Let p be the probability that she knows the answer and 1-p the probability that she gucsses. Assumc that a studcnt who gucsscs at the answer will be correct with probability 1/m, where mis the number of multiple-choice alternatives. What is the conditional probability that a student knew the answer to a question given that she answered it correctly?
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