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Multiple Choice Questions

A tank which contains a mixture of syrup and water in ratio 15 6 25 5 litres of mixture is taken out...........

Quantitative Aptitude(IBPS PO) Mixture and Alligation

A tank which contains a mixture of syrup and water in ratio 15:6. 25.5 litres of mixture is taken out from the tank and 2.5 litres of pure water and 5 litres of syrup is added to the mixture. If resultant mixture contains 25% water, what was the initial quantity of mixture in the tank before the replacement in litres?

77.7

70.78

75.6

80.5

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Explanation:

Quantity of Syrup = 15x
Quantity of water =6x
Total = 21x
Resultant Mixture = 21x – 25.5 + 2.5 + 5 = 21x – 18
Resultant water = 6x – 25.5 * (6/21) + 2.5 = 6x – 7.28
Resultant mixture contains 25% water
(21x – 18)*25/100 = 6x – 7.28
x = 3.7
Initial quantity = 21*3.7 = 77.7