SOLUTION: A set of twenty cards is numbered 1 to 20. If a card is picked at random, what is the probability of choosing a factor of 18?

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Question 926727: A set of twenty cards is numbered 1 to 20. If a card is picked at random, what is the probability of choosing a factor of 18?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The factors of 18 from 1 to 20 are (1,2,3,6,9,18).
So then,
P=6%2F20=3%2F10