70% of people in a bar wear a mask. This percentage rises to 50% among people aged at least 20, who represent 2/3 of the customers. What is the probability that a young person (under 20 years) that is in the bar wears a mask?
70% of people in a bar wear a mask. This percentage rises to 50% among people aged at least 20, who represent 2/3 of the customers. What is the probability that a young person (under 20 years) that is in the bar wears a mask?
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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70% of people in a bar wear a mask. This percentage rises to 50% among people aged at least 20, who represent 2/3
of the customers. What is the probability that a young person (under 20 years) that is in the bar wears a mask?
O (a) 1/2
O (b) 5/21
O (c) 1/5
O (d) 21/50
Successivo
átv A A
AUG
30
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