state gov WBPSC Clerkship Mock Test 2023 - 24 Quantitative Aptitude Ratio and Proportion Age

The total ages of A, B and C at present is 90 years. Ten years ago the ratio of their ages was 1 ∶ 2 ∶ 3. Then the present age of B is:

1

50 years

2

20 years

3

40 years

4

30 years

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