Question 1: Axioms, interpretations and properties of probability A shop sells laptops, smartphones and tablets of different colours. The percentage of devices with different colours is listed in the following table. Suppose that a device is randomly selected. Percentage 20% 5% Device Colour Laptop Smartphone Smartphone Smartphone Tablet Tablet Tablet Grey Black Blue 10% Pink 15% Red Silver White 7% 25% 18% a) What is the probability that the selected device is red? b) What is the probability that the selected device is a smartphone? e) What is the probability that the selected device is not a tablet?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Question 1: Axioms, interpretations and properties of probability
A shop sells laptops, smartphones and tablets of different colours. The percentage of devices with
different colours is listed in the following table. Suppose that a device is randomly selected.
Device
Laptop
Smartphone
Smartphone
Smartphone
Tablet
Tablet
Colour
Grey
Black
Blue
Percentage
20%
5%
10%
Pink
Red
15%
Silver
White
7%
25%
18%
Tablet
a) What is the probability that the selected device is red?
b) What is the probability that the selected device is a smartphone?
e) What is the probability that the selected device is not a tablet?
Transcribed Image Text:Question 1: Axioms, interpretations and properties of probability A shop sells laptops, smartphones and tablets of different colours. The percentage of devices with different colours is listed in the following table. Suppose that a device is randomly selected. Device Laptop Smartphone Smartphone Smartphone Tablet Tablet Colour Grey Black Blue Percentage 20% 5% 10% Pink Red 15% Silver White 7% 25% 18% Tablet a) What is the probability that the selected device is red? b) What is the probability that the selected device is a smartphone? e) What is the probability that the selected device is not a tablet?
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