જો x ∶ y ∶ z = 3 ∶ 4 ∶ 9 હોય, તો (2x + 3y + z) ∶ (2z + x - 3y) ની કિંમત કેટલી હશે?

1
3 ∶ 1
2
2 ∶ 1
3
5 ∶ 3
4
7 ∶ 2

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