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8th Class Mathematics Rational Numbers Question Bank Rational Numbers

  • question_answer
    There are few adults and children in a restaurant. If \[\frac{3}{8}\] of the people in the restaurant are adults and there are 90 more children than adults then how many children are there in the restaurant?

    A)  180                            

    B)         200    

    C)         225                

    D)         230    

    Correct Answer: C

    Solution :

    Let total number of people in the restaurant be x. Then, number of adults\[=\frac{3}{8}x\] \[\therefore \]Number of children \[=\left( \frac{3}{8}x+90 \right)\] According to question, \[\frac{3}{8}x+\left( \frac{3}{8}x+90 \right)=x\] \[\Rightarrow x-\frac{6x}{8}=90\Rightarrow \frac{2x}{8}=90\Rightarrow x=360\] \[\therefore \]Number of children \[=\frac{3x}{8}+90\] \[=135+90=225\]


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