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A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Question
![On a popular app, users rate restaurants as 1, 2,
stars of the selected rating. Here is the probability distribution of XX.
Value x of X
2
ly selected from all the ratings on the app. Let X be the number of
WER
P(X=x) 0.21 0.20 0.11 0.24 0.24
For parts (a) and (b) below, find the probability that the randomly selected restaurant rating has the described number of stars.
(a) 3 or more:
(b) Fewer than 4:](https://content.bartleby.com/qna-images/question/18084dd8-0cd2-4e08-bd77-001f2ce4ed48/e48390de-d5fb-46cf-9348-bfeca03b975b/g1luwba_thumbnail.jpeg)
Transcribed Image Text:On a popular app, users rate restaurants as 1, 2,
stars of the selected rating. Here is the probability distribution of XX.
Value x of X
2
ly selected from all the ratings on the app. Let X be the number of
WER
P(X=x) 0.21 0.20 0.11 0.24 0.24
For parts (a) and (b) below, find the probability that the randomly selected restaurant rating has the described number of stars.
(a) 3 or more:
(b) Fewer than 4:
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