Question

There are 20 cards numbered 1 to 20. A card is picked at random. What is the probability that the card picked is a perfect square​

Answer 1

Total cards = 20

Cards numbered by a perfect square number = 4 (1, 4, 9, 16)

P(card picked is a perfect square​) = 4/20 = 1/5 or 0.2

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