On a popular app, users rate restaurants as 1. 2. 3. 4, or 5 stars. Suppose a rating is randomly se ected from all the ratings on the app. Let X be the number of stars of the selected rating, Here is the probability distribution of X Value x of X P(X=x) 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: 0.21 0.20 0.11 0.24 0.24

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
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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:
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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