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What is the probability that the number on the card is either even or divisible by 3?

What is the probability that the number on the card is either even or divisible by 3?

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Ten cards numbered 11, 12, 13, 14, ., 20 are placed in a box. A card is removed at random from the box.


Asked by Enxian, Last updated: Nov 09, 2024

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John Smith

John Smith

John Smith
John Smith

Answered Sep 29, 2016

3 / 5

Let E be the event that the number of the card is even and T be the event that the number is divisible by 3. E and T are NOT mutually exclusive events. E or T = {12, 14, 15, 16, 18, 20} P(E or T) = n(E or T) / n(S) = 6/10 = 3/5
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