. 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 (i) a prime number less than 20 (ii) a perfect square number.
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1. 11, 13,17. So, probability is 3
2. 16, 25, 36, 49. So, probability is 4
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