જો a ∶ b = 7 ∶ 4 હોય, તો (6a + b) ∶ (6a - b) ની કિંમત શું છે?

1
17 ∶ 13
2
25 ∶ 19
3
33 ∶ 28
4
23 ∶ 19

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