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7th Class Mathematics Sample Paper Mathematics Sample Paper-4

  • question_answer
    The traffic police recorded the speed (in km/h) of 8 cars as 47, 53, 49, 60, 39, 42, 48 and 52. Later on an error in the recording instrument was found. Find the correct mean speed of the cars if the instrument recorded 6 km/h more in each case.

    A) 55.2 km/h         

    B) 56.2 km/h   

    C) 42.75 km/h

    D) 58.2 km/h

    E) None of them

    Correct Answer: C

    Solution :

    Not Available  


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