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      Question

      What is the probability that a number selected from

      1,2,3.......................68,69,70, is perfect square or a perfect cube?
      A 1/5 Correct Answer Incorrect Answer
      B 1/10 Correct Answer Incorrect Answer
      C 1/70 Correct Answer Incorrect Answer
      D 1/7 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Favourable outcomes = 1, 4, 8, 9, 16, 25, 27, 36, 49, 64 No. of favourable outcomes = 10 No. of total outcomes = 70 ∴ Required probability = 10/70 = 1/7

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