A box contains 20 cards from 1 to 20. A card is drawn at random from the box. Find the probability that the number on the drawn card is:
A box contains 20 cards from 1 to 20. A card is drawn at random from the box. Find the probability that the number on the drawn card is:
(i) divisible by 2 or 3
(ii) a prime number
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No. of possible outcomes = 20
(i) Total no. divisible by 2 or 3 = 6, 12, 18 = 3
P(divisible by 2 or 3) = 3/20
(ii) Prime numbers = 2,3,5,7,11,13,17,19 = 8
P(a prime no.) = 8/20 = 2/5
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