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What is the probability that the ticket drawn has a number which is a multiple of 3 or 5? Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random.



A. 1/2
B. 2/5
C. 8/15
D. 9/20

This question is part of Aptitude Communication Test
Asked by Telliant, Last updated: May 28, 2020

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2 Answers

A. Daniels

A. Daniels, Professor, San Diego

Answered Aug 29, 2018

The answer to this is letter D. 9/20. Probability refers to the chances that something is going to happen several times. For example, they say that there is a better probability that someone is going to die going to the outlet for the lottery as compared to winning the lottery. Probability depends on numbers.

There are different ways that you can solve for probability depending on the situation that you are in. There is a different way to solve for probability when you are using the dice. It is also different when you are using cards. If you are interested in knowing more about probability, you can learn more about the different situations.

 

John Smith

John Smith

Answered Jul 05, 2017

9/20

Here, S = {1, 2, 3, 4, ...., 19, 20}. Let E = event of getting a multiple of 3 or 5 = {3, 6 , 9, 12, 15, 18, 5, 10, 20}. P(E) = [n(E)/n(S)] = 9/20
 

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