In what ratio must pulses at ₹72 per kg be mixed with pulses ₹90 per kg so that the mixture be worth ₹80 per kg?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 5 : 4 **
Let the ratio of quantities be $x : y$.
Prices:
Cheaper = ₹72
Costlier = ₹90
Mean price = ₹80
Alligation differences:
$90 - 80 = 10$
$80 - 72 = 8$
Ratio is taken opposite to the differences:
Cheaper : Costlier = $10 : 8 = 5 : 4$
The pulses must be mixed in the ratio $5 : 4$.