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Question

If x:y=2:3 and y:z=5:7, find x:y:z

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Solution

x:y=2:3
Now divide by 3
=2/3:1
Similarly
y:z=5:7
Now divide by 5
=1:7/3
So we get
x:y:z=2/3:1:7/5
Multiplying by 3×5=15
x:y:z=10:15:21

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