IBM
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Numerical Ability
Alligation or Mixture
A can contains a mixture of two liquids A and B is the ratio 7 : 5. When 9 litres of mixture are drawn off and the can is filled with B, the ratio of A and B becomes 7 : 9. How many litres of liquid A was contained by the can initially?
A can contains a mixture of two liquids A and B is the ratio 7 : 5. When 9 litres of mixture are drawn off and the can is filled with B, the ratio of A and B becomes 7 : 9. How many litres of liquid A was contained by the can initially?
A. 10 B. 20
C. 21 D. 25
Read Solution (Total 5)
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- ans 129.4 %
- 11 years agoHelpfull: Yes(5) No(1)
- Suppose the can initially contains 7x and 5x of mixtures A and B respectively.
Quantity of A in mixture left = 7x - 7 x 9 litres = 7x - 21 litres.
12 4
Quantity of B in mixture left = 5x - 5 x 9 litres = 5x - 15 litres.
12 4
7x - 21
4
= 7
5x - 15 + 9
4
9
28x - 21 = 7
20x + 21 9
252x - 189 = 140x + 147
112x = 336
x = 3.
So, the can contained 21 litres of A. - 9 years agoHelpfull: Yes(2) No(1)
- http://www.careerbless.com/aptitude/qa/mixturesandalligations.php
- 8 years agoHelpfull: Yes(0) No(1)
- http://www.indiabix.com/aptitude/alligation-or-mixture/discussion-508
- 8 years agoHelpfull: Yes(0) No(0)
- Suppose the can initially contains 7x and 5x of mixtures A and B respectively.
Quantity of A in mixture left = 7x - 7 x 9 litres = 7x - 21 litres.
12 4
Quantity of B in mixture left = 5x - 5 x 9 litres = 5x - 15 litres.
12 4
7x - 21
4
= 7
5x - 15 + 9
4
9
28x - 21 = 7
20x + 21 9
252x - 189 = 140x + 147
112x = 336
x = 3.
So, the can contained 21 litres of A - 7 years agoHelpfull: Yes(0) No(0)
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