Suppose 309% of the students wish to buy the hard copy of the Probability & Statistics book and remaining to buy the soft copy from a store. Consider randomly selecting 20 students. (a) What is the probability that the number of students who wish to purchase hard copy is more than two standard deviations away from the mean value? (b) The book store has 15 hard copies and license of 15 soft copies. If 20 people come in one by one to purchase the book, what is the probability that all 20 get the type of book they want from the store?
Suppose 309% of the students wish to buy the hard copy of the Probability & Statistics book and remaining to buy the soft copy from a store. Consider randomly selecting 20 students. (a) What is the probability that the number of students who wish to purchase hard copy is more than two standard deviations away from the mean value? (b) The book store has 15 hard copies and license of 15 soft copies. If 20 people come in one by one to purchase the book, what is the probability that all 20 get the type of book they want from the store?
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:Suppose 3096 of the students wish to buy the hard copy of the Probability & Statistics book and remaining to buy the soft copy from a store.
Consider randomly selecting 20 students.
(a) What is the probability that the number of students who wish to purchase hard copy is more than two standard deviations away from the
mean value?
(b) The book store has 15 hard copies and license of 15 soft copies. If 20 people come in one by one to purchase the book, what is the
probability that all 20 get the type of book they want from the store?
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