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Question
Cards numbered from 11 to 60 are kept in a box. If a card is drawn at random from the box, find the probability that the number on the drawn card is a prime number less than 20.
Solution
Total possible outcomes = {11, 12, 13, ...60} = 50
Favourable outcome for getting a prime number less than 20 = {11, 13, 17, 19} = 4
P (getting a prime number) `="Favourable outcomes"/"Total outcomes"=4/50=2/25`
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