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  3. 7th Class
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  5. Data Handling

7th Class Mental Ability Data Handling Question Bank Data Handling

  • question_answer
    If a, b, c, d and e are five consecutive odd numbers, then their mean is:

    A) b                     

    B)   c      

    C) e             

    D)               a

    E) None of these

    Correct Answer: B

    Solution :

    Explanation Let the consecutive odd numbers a, b, c, d and e are as follows \[\operatorname{a} = 2x + 1, b = 2x + 3, c = 2x + 5, d = 2x + 7\] \[\operatorname{and} e = 2x + 9\] \[Mean=\frac{a+b+c+d+e}{5}\] \[=\,\,\frac{\left( 2x+1 \right)+\left( 2x+3 \right)+\left( 2x+5 \right)+\left( 2x+7 \right)+\left( 2x+9 \right)}{5}\]\[=\,\,\,\frac{10x+25}{5}=2x+5=c\]    


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