Question

In: Statistics and Probability

A random sample of computer users were asked which browser they primarily relied on for surfing...

A random sample of computer users were asked which browser they primarily relied on for surfing the Internet and whether this browser was installed on a desktop or laptop computer. The following contingency table shows these results.

Browser

Desktop

Laptop

Internet Explorer

18

56

Firefox

7

37

Chrome

24

77

Safari

3

18

Other

3

7

What is the probability that a randomly selected person from this sample used the Internet Explorer or the Chrome​ browser?

A.

0.585

B.

0.814

C.

0.651

D.

0.700

Solutions

Expert Solution

Definition of probability, p= total no of favourable outcomes / total no of outcomes. Here we need the probability that a randomly chosen person uses either Internet explorer or chrome for browsing. Therefore we took the total no of users who choose Internet explorer + total no of users who choose chrome and divide the quantity of total no of computer users surveyed. The answer we got is 0.7 which is the option D.

orchestra answered 2 years ago
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