The compounded ratio of 2:3 and 5:7 is:

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14: 15

6: 35

41: 32

10: 21

answer is D.

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Detailed Solution

Concept- The ratio of two quantities indicates how many times one quantity is in comparison to the other. For instance, if the mass ratio of body A to body B is 1:2, then body B's mass is twice that of body A's mass. To determine how to calculate the compounded ratio, consult the description of ratio types.
By the definition of compound ratio 2: 3 and 5: 7 can be expressed as

So,the required ratio is 10: 21.
Hence, the correct option is 4.

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