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1. What must be added to each term of the ratio 7 : 11, So as to make it equal to 3 : 4?

A. 8

B. 7.5

C. 6.5

D. 5

Solution:

\begin{aligned} Let x be added to each term . \\ According to question, \\ \frac{7 + x}{11 + x} = \frac{3}{4} \\ O r, 33 + 3 x = 28 + 4 x \\ O r, x = 5 \end{aligned}

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