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Question

In a college, the ratio of the number of boys to girls is $$8:5$$. If there are $$200$$ girls, the total number of students in the college is


A
420
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B
520
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C
620
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D
720
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Solution

The correct option is B $$520$$
Let the boys are $$8x$$ and Girls are $$5x$$
$$\Rightarrow\;5x=200$$
$$\Rightarrow\;x=40$$
Total students $$=8x+5x=13x=13\begin{pmatrix}40\end{pmatrix}=520$$

Mathematics

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