જો a ∶ b ∶ c = 5 ∶ 6 ∶ 4 હોય, તો (a + b + c) ∶ (3a + b - c) ની કિંમત કેટલી છે?

1
18 ∶ 23
2
25 ∶ 23
3
18 ∶ 19
4
15 ∶ 17

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