Ratio-and-Proportion

Question 1
Two numbers are in the ration 3:5. If 9 is subtracted from the numbers, the ratio becomes 12:23. The numbers are
A
30, 50
B
36, 60
C
33, 55
D
42, 70
       Mathematical-Reasoning       Ratio-and-Proportion       2014 December UGC NET Paper 1
Question 1 Explanation: 
A : B = 3 : 5 → (1)
(A - 9) : (B - 9) = 12 : 23 → (2)
Substitute values 33, 55 then it satisfies equations (1) & (2).
Ans:- C
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