Alligation Or Mixture Ques 16
Question
In one litre of mixture of alcohol and water, $30 \%$ is water. The amount of alcohol that must be added to the mixture, so that the part of water in the mixture becomes $15 \%$, is :
(1) 1000 ml
(2) 700 ml
(3) 300 ml
(4) 900 ml
(5) None of these
(IBPS RRBs Officer CWE (Main Exam) 05.11.2017)
Show Answer
Answer: (1)
Solution: (1)
In $1000 ml$ of mixture,
Alcohol $=700 ml$
Water $=300 ml$
Let $x$ ml of alcohol be added.
According to the question,
$\frac{300}{1000+x} \times 100=15$
$\Rightarrow 2000=x+1000$
$\Rightarrow x=2000-1000=1000 ml$.
BETA
