Suppose 39% of questions on a major exam are from past exams. A random sample of 25 questions is selected. Assuming independence, answer the following binomial probability questions Report probabilities accurate to at least 4 decimal places. What is the probability that, of the 25 questions selected: a) exactly 9 are from past exams? b) none of them are from past exams? c) at least 10 are from past exams? d) at most 12 are from past exams?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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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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Suppose 39% of questions on a major exam are from past exams.
A random sample of 25 questions is selected.
Assuming independence, answer the following binomial probability questions.
Report probabilities accurate to at least 4 decimal places.
What is the probability that, of the 25 questions selected:
a) exactly 9 are from past exams?
b) none of them are from past exams?
c) at least 10 are from past exams?
d) at most 12 are from past exams?
Transcribed Image Text:Suppose 39% of questions on a major exam are from past exams. A random sample of 25 questions is selected. Assuming independence, answer the following binomial probability questions. Report probabilities accurate to at least 4 decimal places. What is the probability that, of the 25 questions selected: a) exactly 9 are from past exams? b) none of them are from past exams? c) at least 10 are from past exams? d) at most 12 are from past exams?
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