Homework Sourse30 students and 7 professors are walking across campus 20 of
30 students and 7 professors are walking across campus. 20 of the students and 3 of the professors are carrying a textbook. What is the probability that the person carrying a textbook is a professor?
30 students and 7 professors are walking across campus. 20 of the students and 3 of the professors are carrying a textbook. What is the probability that the person carrying a textbook is a professor?
30 students and 7 professors are walking across campus. 20 of the students and 3 of the professors are carrying a textbook. What is the probability that the person carrying a textbook is a professor?
30 students and 7 professors are walking across campus. 20 of the students and 3 of the professors are carrying a textbook. What is the probability that the person carrying a textbook is a professor?
Solution
Since it is given that the person is carrying a textbook, then we just look at the 20 students and 3 professors.
Thus,
P(professor|textbook) = 3/(20+3) = 3/23 or 0.130434783 [ANSWER]
