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JEE Main & Advanced Mathematics Probability Question Bank Definition of probability

  • question_answer
    Three coins are tossed together, then the probability of getting at least one head is     [RPET 2001; MP PET 1989]

    A)                 \[\frac{1}{2}\]       

    B)                 \[\frac{3}{4}\]

    C)                 \[\frac{1}{8}\]       

    D)                 \[\frac{7}{8}\]

    Correct Answer: D

    Solution :

               P (at least one head) = \[1-P\](0 head)                 \[=1-P\] (All tail)\[=1-\frac{1}{8}\] \[=\frac{7}{8}\].


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