The reciprocal ratio of $12 : 18$ is

18 : 12

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2 : 3

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3 : 2

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2 : 8

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Solution

The correct option is A $18 : 12$
The reciprocal ratio of $a : b$ is $b : a$ .
Thus, the reciprocal ratio of $12 : 18$ is $18 : 12$ .

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217 : 218

(x + 12) : (x + 21)

Question 94 (e)

Taking $x = \frac{- 4}{9}, y = \frac{5}{12}$ and $z = \frac{7}{18},$ find
The reciprocal of x + y.

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