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 \[=273:243=91:81\]You need to login to perform this action.
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