A university found that 20% of its students withdraw without completing the introductory statistics course. Assume that 20 students registered for the course. (a) Compute the probability that 2 or fewer will withdraw. If required, round your answer to four decimal places. (b) Compute the probability that exactly 4 will withdraw. If required, round your answer to four decimal places. (c) Compute the probability that more than 3 will withdraw. If required, round your answer to four decimal places. (d) Compute the expected number of withdrawals.
A university found that 20% of its students withdraw without completing the introductory statistics course. Assume that 20 students registered for the course. (a) Compute the probability that 2 or fewer will withdraw. If required, round your answer to four decimal places. (b) Compute the probability that exactly 4 will withdraw. If required, round your answer to four decimal places. (c) Compute the probability that more than 3 will withdraw. If required, round your answer to four decimal places. (d) Compute the expected number of withdrawals.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:A university found that 20% of its students withdraw without completing the introductory statistics course. Assume that 20 students registered for the course.
(a) Compute the probability that 2 or fewer will withdraw. If required, round your answer to four decimal places.
(b) Compute the probability that exactly 4 will withdraw. If required, round your answer to four decimal places.
(c) Compute the probability that more than 3 will withdraw. If required, round your answer to four decimal places.
(d) Compute the expected number of withdrawals.
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Can you please show how the math is done in one of the calculations, I cannot figure out what is being done?
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