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CLAT CLAT Solved Paper-2011

  • question_answer
    A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, the probability that it bears a perfect square number is

    A)  1/10    

    B)  1/11

    C)  1/90                           

    D)  1/9

    Correct Answer: A

    Solution :

                            Ans.   Perfect square number from 1 to 90 are 1, 4, 9, 16, 25, 36, 49, 64, 81.             Thus, there are 9 square numbers between 1to90.             Hence, required probability\[=\frac{9}{90}=\frac{1}{10}\]


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