Solution: What is the chance that it will be a multiple of 3 or of 7?

From 20 tickets marked with the first 20 numerals, one is drawn at random. What is the chance that it will be a multiple of 3 or of 7?

What is the chance that it will be a multiple of 3 or of 7?

Problem Statement: ME Board April 1996

From 20 tickets marked with the first 20 numerals, one is drawn at random. What is the chance that it will be a multiple of 3 or of 7?

Problem Answer:

The chance that it will be a multiple of 3 or of 7 is 2/5.

Solution:

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