In what ratio should coal at the rate of 20 per kg, be mixed with coal at the rate 17 per kg so that if the mixture is sold at the rate of 19.80 per kg, 10% profit is made?
a) 1:2
b) 3:5
C) 2:1
d) 3:2
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Answer:
By mixture and alligation method
SP given
From tat find CP
19.8*100/110=18
20. 17
18
(18-17)=1 (20-18)=2
ANS:1:2
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