the ratio of the number of boys and girls in a college is 6:9 .if the percentage increase in the number of boys and girls be 30%snd 10%respectively ,what will be the new ratio
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Step-by-step explanation:
At this, the total number of students in the school became 1200, and the ratio of boys to girls changed to 7 : 5. The number of students in the school ...
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The new ratio is 26:33.
Given - Old ratio and percentage increase
Find - New ratio
Solution - Let the number of boys and girls be 6x and 9x.
So, new number of boys = 6x + 30%*6x
New number of boys = 6x + 1.8x
New number of boys = 7.8x
New number of girls = 9x + 10%*9x
New number of girls = 9x + 0.9x
New number of girls = 9.9x
New ratio = 7.8x:9.9x
New ratio = 78:99
Performing division by 3
New ratio = 26:33
Hence, the new ratio is 26:33.
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