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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-17

  • question_answer
    The average of 25 results is 18. The average of first 12 of them is 14 and that of the last 12 is 17. Find the 13th result.

    A) 71                                

    B) 75

    C) 72                                

    D) 78

    Correct Answer: D

    Solution :

    Sum of 25 results \[=18\times 25=450\] Sum of first 12 results \[=14\times 12=168\] Sum of last 12 results \[=17\times 12=204\] \[\therefore \]  13th result \[=450-204-168\mathbf{=78}\]


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