. Find the probability that none of the selected adults say that they were too young to get tattoos.   ​(Round to four decimal places as​ needed.)   b. Find the probability that exactly one of the selected adults says that he or she was too young to get tattoos.   ​(Round to four decimal places as​ needed.)   c. Find the probability that the number of selected adults saying they were too young is 0 or 1.

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 8CR
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Question
Based on a​ poll, among adults who regret getting​ tattoos, 27​% say that they were too young when they got their tattoos. Assume that eight
adults who regret getting tattoos are randomly​ selected, and find the indicated probability. Complete parts​ (a) through​ (d) below.
 
a. Find the probability that none of the selected adults say that they were too young to get tattoos.
 
​(Round to four decimal places as​ needed.)
 
b. Find the probability that exactly one of the selected adults says that he or she was too young to get tattoos.
 
​(Round to four decimal places as​ needed.)
 
c. Find the probability that the number of selected adults saying they were too young is 0 or 1.
 
​(Round to four decimal places as​ needed.)
 
 
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Follow-up Questions
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Follow-up Question
Based on a​ poll, among adults who regret getting​ tattoos,
12​%
say that they were too young when they got their tattoos. Assume that
seven
adults who regret getting tattoos are randomly​ selected, and find the indicated probability. Complete parts​ (a) through​ (d) below.
 
 
 
 

Question content area bottom

Part 1
 a. Find the probability that none of the selected adults say that they were too young to get tattoos.
 
0.40870.4087
​(Round to four decimal places as​ needed.)
Part 2
b. Find the probability that exactly one of the selected adults says that he or she was too young to get tattoos.
 
0.39010.3901
​(Round to four decimal places as​ needed.)
Part 3
c. Find the probability that the number of selected adults saying they were too young is 0 or 1.
 
0.79880.7988
​(Round to four decimal places as​ needed.)
Part 4
d. If we randomly select
seven
​adults, is 1 a significantly low number who say that they were too young to get​ tattoos?
 
No,
No,
Yes,
because the probability that
 
 
of the selected adults say that they were too young is
 
 
0.05.
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