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      Question

      8 students appear in an examination. In how many ways

      can the result be announced?
      A 128 Correct Answer Incorrect Answer
      B 256 Correct Answer Incorrect Answer
      C 196 Correct Answer Incorrect Answer
      D 32 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Each students can either pass or fail So there exists two possibilities for each students. So total number of ways = 2⁸ = 256

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