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NTSE Sample Paper NTSE SAT Practice Test-6

  • question_answer
    The average of 11 numbers is 10.9. If the average of the first six numbers is 10,5 and that of the last six numbers be 11.4, the middle number is

    A) 11                    

    B)        11.3

    C) 11.4                 

    D) 11.5

    Correct Answer: D

    Solution :

    [d] Middle number \[=\left( 10.5\times 6+11.4\times 6 \right)-\left( 10.9\times 11 \right)=11.5\]


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