| A mixture of oil and water contains 35% oil by weight, 25 g of water is added to 100 g of such a mixture. |
| What percentage of oil by weight is there in the new mixture? |
A) 15%
B) 25%
C) 28%
D) 30%
Correct Answer: C
Solution :
Percentage of oil by weight in new mixture \[=\frac{35}{(100+25)}\times 100=\frac{35}{125}\times 100=28%\]
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