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### Question

A sample of alcohol has 40% water, and another sample has 60% water. If equal volumes of both the samples are combined, what is the percentage of water in the new sample?

**A**

50 %.

**B**

52 %.

**C**

48 %.

**D**

54 %.

**Soln.**

**Ans: a**

If 100 units of both alcohol are combined, there will be 100 units of water in 200 units of the new sample. The percentage of water is $100/200$ × 100 = 50%.