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 the student guesses. Assume that a student who guesses at the answer will be 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 he or she answered it correctly?

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 46E: Assume that a survey of 282 people is taken to determine the opinions of doctors, teachers, and...
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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 the student guesses. Assume that a student who guesses at the
answer will be 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 he or she answered it correctly?
|
Transcribed Image Text: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 the student guesses. Assume that a student who guesses at the answer will be 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 he or she answered it correctly? |
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