cards marked with numbers 5,6,7,............... 74 are placed in a bag and mixed thoroughly . one card is drawn at random from the bag . find the probability that the number on the card is a perfect square

between 5 and 74, there are 6 perfect squares : 9, 16, 25, 36, 49 and 64.

also there are (74 -5 ) + 1 = 70 cards in the bag. 

p ( perfect square) = 6 / 70 = 3 / 35

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