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What quantity of sugar costing Rs 6.10 per kg must be mixed with 126 kg of sugar priced at Rs. 2.85 per kg, so that 20% may be gained by selling the mixture at Rs 4.80 per kg?

A.	49 kg	B.	59 kg
C.	69 kg	D.	68 kg

Answer and Explanation

Answer:69 kg

Explanation:
R1=Sugar costing Rs 2.85 per kg
R2= Sugar costing Rs 6.10 per kg
RM=Average cost of mixture
We know that the mixture is being sold at a profit of 20%
ie, cost price of mixture=(100/120)*4.80=Rs 4

RM = Rs 4 = 400 paise

R1=285 paise
R2=610 paise

N1=210
N2=115

N1/N2 = 210/115 = 42/23

If quantity of sugar at 285 paise per kg is 42 kg,
Then sugar at 610 paise per kg = 23 kg

∴ if sugar at 285 paise per kg is 126 kg,
Then sugar at 610 paise per kg=69 kg

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