A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Multiple-choice questions each have 5 possible answers, one of which is correct. Assume that you guess the answers to 5 such questions.

Use the multiplication rule to find the probability that the first four guesses are wrong and the fifth is correct. That is, find
P
(
W
W
W
W
C
)
P(WWWWC)
, where C denotes a correct answer and W denotes a wrong answer.
(round answer to 4 decimal places)
P
(
W
W
W
W
C
)
=
P(WWWWC)=


What is the probability of getting exactly one correct answer when 5 guesses are made?
(round answer to 4 decimal places)
P(exactly one correct answer)

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