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Railways R.R.C. (Kolkata) Solved Paper Held on 2nd Shift 27-10-2013

  • question_answer
    The average of 6 numbers is 30. If the average of first four is 25 and that of last is 35, the fourth number is?

    A) 25                                

    B) 30

    C) 35                    

    D) None of these

    Correct Answer: A

    Solution :

    Required fourth number \[=4\times 25+3\times 35-6\times 30\] \[=100+105-180=205-180=25\]


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