Asked by Gabriela

x is chosen at random from all integers between 1 and 20 inclusive. What is the probability that it is a multiple of 3?

5 years ago

Answered by Reiny

Listing the multiples of 3 form 1 to 20:
3, 6, ...., 18

how many are there?
What is the prob ?

5 years ago

Answered by oobleck

There are 20 numbers
There are 6 multiples of 3
So, P(x=3k) = 6/20

5 years ago

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