state gov WBPSC Clerkship Mock Test 2023 - 24 Quantitative Aptitude Ratio and Proportion

যদি a ∶ b = 3 ∶ 5 এবং b ∶ c = 7 ∶ 8 হয়, তাহলে 2a ∶ 3b ∶ 7c কত হবে ?

1
42 ∶ 105 ∶ 280
2
15 ∶ 21 ∶ 40
3
6 ∶ 15 ∶ 40
4
30 ∶ 21 ∶ 350
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