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If a/7 = b/9 = c/11, then find a : b : c?

11 : 9 : 7
9 : 7 : 11
7 : 9 : 11
11 : 7 : 9

Correct Answer: 7 : 9 : 11

Explanation:

Let a/7 = b/9 = c/11 = K
Then, a = 7K, b = 9K, c = 11K
∴ a : b : c = 7K : 9K : 11K = 7 : 9 : 11

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