If a ∶ b = 3 ∶ 5 and b ∶ c = 3 ∶ 4, then 2a ∶ 3b ∶ 3c is equal to:

1
6 ∶ 45 ∶ 22
2
18 ∶ 25 ∶ 20
3
6 ∶ 15 ∶ 20
4
28 ∶ 45 ∶ 22

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