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CUET
General Test
Numerical Ability
Ratios
If a : b = 2 : 3 and c : d = 5a : 3b, then 2c : 5d is equal to:
1 : 1
10 : 9
4 : 9
9 : 10
A : B = 2 : 3
⇒ C : D = 5a : 3b = 5(2) : 3(3) = 10 : 9
⇒ 2c : 5d = 2(10) : 5(9) = 20 : 45 = 4 : 9