7. Coffee costing * 250 per kg was mixed with chicory costing 75 per kg in the ratio 5:2 for a
certain blend. If the mixture was sold at 230 per kg, find the gain or loss per cent.
Hint. Let 5 kg of coffee be mixed with 2 kg of chicory
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Answer:
Step-by-step explanation:
cost of coffee=250 per kg.
cost of chicory =75 per kg
coffee: chicory 5:2
if the weight of mixture is 1 kg.
5x+2x/7=1
⇒7x=7
⇒x=1
∴ weight of coffee = 5x/7
=5/7 kg
weight of chicory = 2x/7
=2/7kg
cost of 5/7 kg coffee = 5/7*250= 1250/7
cost of 2/7kg chicory=2/7*75=150/7
total cost of 1 kg mixture = 125+150/7
cost price of 1 kg mixture = 1400/7
=200 Rs
selling of 1 kg minute = 230 Rs
gain or loss = SP-CP/CP*100
=230-200/200*100
=30/2
15%
since its positive, the mixture was sold at a gain of 15%
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