A box contains 90 marbles each numbered from 1 to 90. A marble is drawn at random. The probability that marble bears a perfect square is

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Solution

No of perfect square numbers in between 1 and 90

=> 1 , 4 , 9 , 16, 25, 36, 49, 64, 81

=> 9 numbers

Total number of Marbles = 90

Therefore Probabilty = 9/90 = 1/10

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