Question
There is a bottle of coke. 25% is replaced by pepsi. Again 25% is replaced by Pepsi and finally another 25% is replaced by Pepsi. What is the approximate final % of coke in the bottle?
Answer: Option C
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C
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C
Option (c)
Let the bottle contain 100 units of liquid.
Liquid taken out in each case is 25%
The final quantity of component from the original mixture that is not being replaced, if this operation is repeated 3 times, is 100(1−25100)3
100(0.75)3=42.18%
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