যদি a : b = 5 ∶ 6 এবং b : c = 2 ∶ 3 হয়, তাহলে a ∶ b ∶ c নির্ণয় করো।

1
5 ∶ 6 ∶ 9
2
5 ∶ 6 ∶ 3
3
2 ∶ 6 ∶ 5
4
5 ∶ 6 ∶ 7

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