railway DFCCIL MTS 2025 Mock Test Series Quantitative Aptitude Ratio and Proportion Simple Ratios

If a ∶ b = 3 ∶ 5, b ∶ c = 7 ∶ 8 and c ∶ d = 2 ∶ 3, then 2a ∶ 3d is equal to

1
1 ∶ 2
2
7 ∶ 15
3
7 ∶ 20
4
7 ∶ 30
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