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JEE Main & Advanced Mathematics Probability Question Bank Definition of probability

  • question_answer
    Four coins are tossed. The probability that at least one head turns up, is                                      [DSSE 1981]

    A)                 1/16       

    B)                 1/4

    C)                 15/16     

    D)                 None of these

    Correct Answer: C

    Solution :

                    Required probability is \[1-p\](no head) \[=1-{{\left( \frac{1}{2} \right)}^{4}}=\frac{15}{16}\].


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