JEE Main & Advanced Mathematics Probability Question Bank Use of permutations and combinations in probability

  • question_answer
    The probability of getting 4 heads in 8 throws of a coin, is

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

    B)            \[\frac{1}{64}\]

    C)            \[\frac{^{8}{{C}_{4}}}{8}\]      

    D)            \[\frac{^{8}{{C}_{4}}}{{{2}^{8}}}\]

    Correct Answer: D

    Solution :

               Required probability \[=\frac{{}^{8}{{C}_{4}}}{{{2}^{8}}}.\]


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