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Railways R.R.C. (Gorakhpur) Solved Paper Held on 2nd Shift 30-11-2014

  • question_answer
    Average of 10 numbers is 20. It two numbers are taken out, the average remains 20. If one of the numbers taken out is 15, what is the other number?

    A) 40                                

    B) 20

    C) 15                                

    D) 25

    Correct Answer: D

    Solution :

    Other number \[=20\times 10-20\times 8-15\] \[=200-160-15\] \[=200-175=25\]


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