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If A is $\frac{5}{3}$ of B and B is $\frac{4}{7}$ is of C then A : B : C is ?

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21 : 12 : 20

20 : 12 : 21

5 : 4 : 7

5 : 3 : 7

answer is B.

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Detailed Solution

$A = \frac{5}{3} \times B$ $\Rightarrow A : B = 5 : 3$

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