CAT 2018 Allegations and Mixtures Question (Medium)

Question

A jar contains a mixture of 175 ml water and 700 ml alcohol. Gopal takes out 10 of the mixture and substitutes it by water of the same amount. The process is repeated once again. The percentage of water in the mixture is now

Accepted Answer

Step 1 Initial quantities Water 175 ml, Alcohol 700 ml Total 875 ml Step 2 First operation 10 of 875 87.5 ml of mixture removed Water removed 10 of 175 17.5 ml Alcohol removed 10 of 700 70 ml Water left 175 - 17.5 157.5 ml Alcohol left 700 - 70 630 ml Now add 87.5 ml water Water becomes 157.5 87.5 2

CAT 2018

Quantitative

Allegations and Mixtures

Medium

A jar contains a mixture of 175 ml water and 700 ml alcohol. Gopal takes out 10% of the mixture and substitutes it by water of the same amount. The process is repeated once again. The percentage of water in the mixture is now

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