SSC Sample Paper Mock Test-3 SSC CGL Tear-II Paper-1

  • question_answer
    The ratio of the numbers of boys and girls of a school with 504 students is 13 : 11. What will be the new ratio if 12 more girls are admitted?

    A)  91 : 81

    B)  81 : 9

    C)  9 : 10              

    D)  10 : 9

    Correct Answer: A

    Solution :

    Total numbers of girls in the school \[=504\times \frac{11}{13+11}=504\times \frac{11}{24}=231\] Total numbers of boys in the school \[=504\times \frac{13}{13+11}=504\times \frac{13}{24}=273\] Now, total number of girls when 12 more girls are admitted \[=231+12=243\] \[\therefore \]New ratio of boys and girls \[=273:243=91:81\]                  


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