Question: If a : b = 4 : 7 and b : c = 5 : 6, then a : b : c =?
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a.7 : 6
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b.20 : 35 : 30
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c.20 : 35 : 42
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d.24 : 42 : 30
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e.none of these
Answer: c
 7 : 6 b) 20 : 35 : 30 c) 20 : 35 : 42 d) 24 : 42 : 30 e) none of these Ans. c) 20 : 35 : 42
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