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  3. 7th Class
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  5. Data Handling

7th Class Mathematics Data Handling Question Bank Data Handling

  • question_answer
    The mean of 5 numbers is 20. If one number is excluded, mean of the remaining numbers becomes 23, then the excluded number is ____.                   

    A)  4                                

    B)  92                  

    C)  100    

    D)         8   

    Correct Answer: D

    Solution :

    Let the excluded number be x. Sum of 5 numbers \[=20\times 5=100\] After excluding x, Sum of 4 numbers \[=4\times 23=92.\] \[\therefore \]  \[x=100-92\text{ }\Rightarrow \text{ }x=8\]


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