8th Class Mathematics Comparing Quantities Question Bank Comparing Queantities

  • question_answer The ratio of the number of boys and girls in a college is 7 : 8. If the percentage increase in the number of boys and girls be 20% and 10% respectively. What will be the new ratio?

    A)  8 : 9                            

    B)  17 : 18

    C)  21 : 22      

    D)  can't be determined

    Correct Answer: C

    Solution :

    (c): Let nos be \[7x,8x\] After increase, Boys\[=7x\times 1.2=8.4x\] Girls = \[8x\times 1.1=8.8x\] New ratio = \[\frac{8.4x~}{8.8x}=\frac{21}{22}\].

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