a box contains 90 cards which are numbered from 1 to 90 if a card is drawn at random from the box find the probability that gets two digits number a perfect square number
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Number of two-digit number =90−9=81, Total number =90
Probability of being a two-digit number = 81/90
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Answer:
Total card=90
Since 2 digit perfect sq. no. till 90 are 16,25,36,49,64,81
Therefore there are total 6 two digit square number.
Probability of getting a two digit no. a perfect sq. no.= 6/90
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