Amy rolls 17 10-sided dice. What is the probability that at least 1 of the rolls are 2s? Solution: Let X be the number of 2s rolled. X is Binomial(17,1/10). P(X ≥ 1) = 1 − P(X < 1) 0.8332 Amy rolls 18 5-sided dice. What is the probability that at most 2 of the rolls are 2s? Solution: Let X be the number of 2s rolled. X is Binomial(18,1/5). 0.2713.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 14CR
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Amy rolls 17 10-sided dice. What is the probability that at least 1 of the rolls are 2s?

Solution: Let X be the number of 2s rolled. X is Binomial(17,1/10). P(X ≥ 1) = 1 − P(X < 1)

0.8332

Amy rolls 18 5-sided dice. What is the probability that at most 2 of the rolls are 2s?

Solution: Let X be the number of 2s rolled. X is Binomial(18,1/5).

0.2713. 

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