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Railways Sample Paper RRB (Group D) Sample Test Paper-3

  • question_answer
    The average of 12 numbers is 15 and the average of the first two is 14. What is the average of the rest?

    A)   \[15\frac{1}{5}\]         

    B)  14

    C)   \[14\frac{1}{5}\]         

    D)  15

    Correct Answer: A

    Solution :

    [a] Average of rest two \[=\frac{15\times 12-\,14\times 2}{10}=\frac{180-\,28}{10}=\,15.2=\,15\frac{1}{5}\]


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