P ∶ Q = 2 ∶ 3 மற்றும் Q ∶ R = 4 ∶ 5 எனில், (P + Q) ∶ (Q + R) என்ன?

1
25 ∶ 27
2
2 ∶ 3
3
8 ∶ 15
4
20 ∶ 27

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