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Question
A box contains 20 cards numbered from 1 to 20. A card is drawn at random from the box. Find the probability that the number on the drawn card is divisible by 2 or 3.
Solution
Total number of cards = 20
Numbers divisible by 2 or 3 are 2, 3, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18 and 20.
Total favourable number of cards = 13
Probability that the number on the drawn card is divisible by 2 or 3 = `"Total favourable number of cards"/"Total number of cards"=13/20`
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