A box contains cards numbered 6 to 55. A card is drawn at random from the box. The probability that the drawn card has a number which is a perfect square, is
Explanation
The total number of cards in the box is 55 - 6 + 1 = 50. The perfect squares between 6 and 55 are 9, 16, 25, 36, and 49. So, there are 5 perfect squares. The probability of drawing a card with a perfect square is 5/50 = 1/10.
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