How many kg of sugar at Rs 9/kg must be mixed with 27 kg at Rs 7/kg so mixture is worth Rs 7.75/kg?
16.2 kg
The answer
By alligation: cheap:dear = (9-7.75):(7.75-7) = 5:3. If cheap=27, dear=27x3/5=16.2 kg.
Source: Verified
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