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10th Class Mathematics Probability Question Bank Probability

  • question_answer
    A four - digit number is formed by using the digits 1, 2, 4, 8 and 9 without repetition. If one number is selected from those numbers, then what is the probability that it will be an odd number?

    A)  \[\frac{1}{5}\]                         

    B)  \[\frac{2}{5}\]

    C)  \[\frac{3}{5}\]                         

    D)  \[\frac{4}{5}\]

    Correct Answer: B

    Solution :

    (b): Total number of outcomes \[=5\times 4\times 3\times 2=120\] the number of favourable cases \[=(2\times 4\times 3\times 2)=48\] (i.e., odd number) The required probability \[=\frac{48}{120}=\frac{2}{5}\].


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