A) 6 : 7
B) 8 : 9
C) 7 : 8
D) 7 : 9
Correct Answer: C
Solution :
Let \[x\]be included in the ratio. According to the question, \[25x+29x=270\] \[\therefore \] \[54x=270\] \[\therefore \] \[x=\frac{270}{54}=5\] Number of boys \[=25x=25\,\,\,\,5=125\] Number of girls \[=29x\] \[=29\,\,\,5=145\] Total boys \[=125+15=140\] Total girls \[=145+15=160\] \[\therefore \]New respective ratio of the boys and girls. \[=\frac{140}{160}=\frac{7}{8}=7:8\]You need to login to perform this action.
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