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Railways Sample Paper RRB (Group D) Sample Test Paper-4

  • question_answer
    The average of 5 members of a family is 24 years. If the youngest member is 8 years old, then what was the average age (in years) of the family at the time of the birth of the youngest member?

    A)  16                   

    B)  20

    C)  24                   

    D)  32

    Correct Answer: B

    Solution :

    [b] Required average age \[=\frac{(24\times 5-8\times 5)}{4}\] \[\Rightarrow \frac{120-40}{4}\Rightarrow \frac{80}{4}=20\]Year


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