JEE Main & Advanced Mathematics Probability Question Bank Definition of probability

  • question_answer
    Find the probability that the two digit number formed by digits 1, 2, 3, 4, 5 is divisible by 4 (while repetition of digit is allowed) [UPSEAT 2002]

    A)                 \[\frac{1}{30}\]    

    B)                 \[\frac{1}{20}\]

    C)                 \[\frac{1}{40}\]    

    D)   None of these

    Correct Answer: D

    Solution :

               Total number of numbers \[={{(5)}^{2}}\]            Favourable cases  = [12, 24, 32, 44, 52]                 \ Required probability \[=\frac{5}{25}=\frac{1}{5}.\]


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