In a package, there are a total of 40 power banks. 5 of these had been rated with 5 stars, 30 had been rated with 3 stars, the remaining had been rated with 1 star. Eight power banks were to be sold in a certain mall and will randomly selected from the package. What is the probability that of the 8 sold to the mall, there are exactly 2 five-star rated, 4 three-star rated and 2 one-star rated power banks?

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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In a package, there are a total of 40 power
banks. 5 of these had been rated with 5 stars,
30 had been rated with 3 stars, the remaining
had been rated with 1 star. Eight power banks
were to be sold in a certain mall and will
randomly selected from the package. What is
the probability that of the 8 sold to the mall,
there are exactly 2 five-star rated, 4 three-star
rated and 2 one-star rated power banks?
Select the correct response:
O 6.42%
O 3.56%
O 1.68%
40%
Transcribed Image Text:In a package, there are a total of 40 power banks. 5 of these had been rated with 5 stars, 30 had been rated with 3 stars, the remaining had been rated with 1 star. Eight power banks were to be sold in a certain mall and will randomly selected from the package. What is the probability that of the 8 sold to the mall, there are exactly 2 five-star rated, 4 three-star rated and 2 one-star rated power banks? Select the correct response: O 6.42% O 3.56% O 1.68% 40%
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