In a set of 60 tickets numbered from 1 to 60, one ticket is randomly selected. What is the probability that the selected ticket number is a multiple of 3 or 4?

Answer Choices

Correct answer marked below

1/15

1/4

1/3

1/2

Correct

5/12

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Explanation

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Official Explanation

Official

To solve this, we first count the numbers divisible by 3 from 1 to 60, which gives us 20. Next, we find the numbers divisible by 4 from 1 to 60, which totals 15. However, we must account for the common multiples of 3 and 4, which are the multiples of 12. There are 5…

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Comments

KimberlyMay 8, 2024

thanks for taking time to upload it!

RajatOct 25, 2024

thanks

What this question tests

What it tests

Your ability to compute probabilities of single and compound events, including 'at least one' questions.

Common trap

Forgetting to use the complement for 'at least one', or treating dependent events as independent.