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### Question

If 10% of a number is equal to 3/5 of another number, then what is the ratio of first number to second number?

**A**

6.

**B**

7.

**C**

5.

**D**

3.

**Soln.**

**Ans: a**

We have ${10A}/100 = {3B}/5$, which can be re-arranged to $A/{3 × 100} = B/{10 × 5}$, so the required ratio is (3 × 100) : (10 × 5), which is 6 : 1. So the answer is 6.