7th Class Mathematics Comparing Quantities Question Bank Comparing Quantities

  • question_answer A group of boys went to a restaurant for lunch, where 40% of the boys ordered thali and the remaining six boys ordered snacks. How many boys went to the restaurant?

    A)  15                               

    B)  10

    C)  5                                

    D)  7

    Correct Answer: B

    Solution :

    (b) Let number of boys be 'x' then, \[40%\Rightarrow \frac{40}{100}\times x=\frac{2}{5}x\] ordered thali remaining boys\[=x-\frac{2}{5}x=\frac{3}{5}x\] \[\therefore \]\[\frac{3}{5}x=6\] (boys who ordered snacks) \[\therefore \]\[x=\frac{6\times 5}{3}=10\]

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