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(Q) In what ratio must a grocer mix two varieties of pulses costing Rs. 15 and Rs. 20 per kg respectively so as to get a mixture worth Rs. 16.50 per kg
A) 3 : 7
B) 5 : 7
C) 7 : 3
D) 7 : 5
Explanation : Let the ratio be x:y.
Suppose x kg of pulse1 and y kg of pulse2 is mixed. The total kg of the mixture will be (x+y)kg.
So, equating the costs:
15x+20y=16.5(x+y).
1.5x=3.5y.
So, x/y=3.5/1.5.
->x:y=7:3.
B) 5 : 7
C) 7 : 3
D) 7 : 5
View Answer
C) 7 : 3Explanation : Let the ratio be x:y.
Suppose x kg of pulse1 and y kg of pulse2 is mixed. The total kg of the mixture will be (x+y)kg.
So, equating the costs:
15x+20y=16.5(x+y).
1.5x=3.5y.
So, x/y=3.5/1.5.
->x:y=7:3.
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Aptitude : Alligation Or Mixture
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