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5th Class Mathematics Arithmetic Question Bank Arithmetic

  • question_answer
    The average temperature of the first three days of a week is \[{{27}^{o}}C\] and that of the next three days is\[{{29}^{o}}C\]. If the weekly average is\[{{28.5}^{o}}C\], what is the temperature on the last day?

    A) \[{{31.5}^{o}}C\]                   

    B) \[{{28}^{o}}C\]          

    C)        \[{{21}^{o}}C\]          

    D)        \[{{42}^{o}}C\]

    Correct Answer: A

    Solution :

    \[28.5\times 7-27\times 3-29\times 3={{31.5}^{o}}C\]


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