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      Question

      What is the probability of getting atleast one head if

      three unbiased coins are tossed?
      A 7/8 Correct Answer Incorrect Answer
      B 1/2 Correct Answer Incorrect Answer
      C 5/8 Correct Answer Incorrect Answer
      D 8/9 Correct Answer Incorrect Answer

      Solution

      The sample space is = {TTT, TTH, THT, HTT, THH, HTH, HHT, HHH} Let E is the event of getting atleast one head Then E = {TTH, THT, HTT, THH, HTH, HHT, HHH} P(E) = n(E) / n(S) = 7/8.

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