Alligation Or Mixture Ques 14
Question
In 65 litres of mixture of water and milk, water is only $20 \%$. The milkman gave 26 litres of this mixture to a customer and then he added 7 litres of pure milk and 4 litres of pure water in the remaining mixture. What is the percentage of water in the final mixture?
(1) 27.6
(2) 23.6
(3) 29.6
(4) 24.6
(5) 25.5
(IBPS RRBs Officers CWE (Prelim Exam) 09.09.2017 IInd Sitting)
Show Answer
Answer: (2)
Solution: (2)
Remaining mixture after giving 26 litres of it to the first customer $=(65-26)$ litres $=39$ litres
Quantity of milk $=39 \times \frac{4}{5}$ $=31.2$ litres
Quantity of water $=(39-31.2)$ litres $=7.8$ litres
On adding 7 litres of pure milk
and 4 litres of water,
Quantity of water $=(7.8+4)$ litres $=11.8$ litres
Quantity of resulting mixture $=(39+11)$ litres $=50$ litres
$\therefore$ Required per cent $=\frac{11.8}{50} \times 100=23.6 \%$
BETA
