krishnasty wrote:
Solution X contains 20% of material A and 80% of material B. Solution Y contains 30% of material A and 70% of material B. A mixture of both these solutions contains 22% of material A in the final product. how much solution X is present in the mixture?
Please post the answer choices for a PS question.
For any mixture problem in GMAT, please use the alligation technique:
trigger points:
From any mixture problem, note down the below 3 pointers first.
1) What is solution 1
2) what is solution2
3) what is the resulting solution
For example, i have a solution with 40% milk (==> rest i.e. 60% is water) and i have one more solution which is with 70% milk ==> 30% water
qtn: if we mix these two solutions in a particulr ratio to get a resultant solution with 50% milk, how much % solution1 exists in the resultant solution?
40------------70
------50
20------------10 ==> use the solution 1 and solution2 in the ratio 2:1 to get a resultant solution with 50% milk
means if i use 200liters of sultion 1, then i have to use 100liters of solution 2 resulting 300liters of 50%milk..hope it is clear.
Back to the Original qtn:
solutionX: 20% of A
solutionY: 30% of A
resulting solution - 22% of A
X-------------Y
20------------30
-------22
8--------------2 ==> 4:1
==>
4/5 or 80% of the resultant solution is X and 20% of that is Y
Regards,
Murali.
Kudos?