a number is selected at random from first 20natural numbers. then the probability that the number is multiple of 3is
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total no. = 20
no. that r multiple of 3 is = {1,3,6,9,12,15,18}
P = 7/20
no. that r multiple of 3 is = {1,3,6,9,12,15,18}
P = 7/20
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