Question

A publisher sends advertising material for a statistics text to 90% of all professors teaching the appropriate statistics course. Twenty-five percent of the professors who received this material adopted the book. Fifteen percent of the professors who did not receive the material also adopted the book. What is the probability that a professor has received the advertising material but did not adopt the book?
Select one:
A. 0.6750
B. 0.0625
C. 0.7500
D. 0.8882

Answer 1

Construct a tree diagram with the given information.

Probability that a professor has received the advertising material but did not adopt the book is shown

in the blue path in the above tree diagram

Required probability = 0.90 * 0.75 = 0.6750

Answer :

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