9th Class Mathematics Statistics Question Bank Statistics

  • question_answer
    The mean temperature of Monday, Tuesday and Wednesday is \[40{}^\circ C.\] The mean temperature of Tuesday, Wednesday and Thursday is \[41{}^\circ C.\] If the temperature of Thursday is \[30{}^\circ C,\] then the temperature on Monday is

    A)  \[27{}^\circ C\]     

    B)  \[30{}^\circ C\]

    C)  \[25{}^\circ C\]                               

    D)  \[35{}^\circ C\]

    Correct Answer: A

    Solution :

        Total temperature of Monday, Tuesday and Wednesday\[=40\times 3=120{}^\circ C.\] Total temperature of Tuesday, Wednesday and Thursday\[=41\times 3=123{}^\circ C\] Temperature of Thursday\[=30{}^\circ C\] So, Temperature of Monday \[=\left( 120+30-123 \right){}^\circ C\] \[=27{}^\circ C\]                             


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