A person bought some pens at the rate of 3 for RS. 20 and twice the pens at a rate of 4 for RS. 26. All the pens were sold at the rate of RS. 118 per dozen. Find his gain percent.
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Step-by-step explanation:
let number of pens bought for 3 for 20 be x.
then number of pens bought at 4 for 26 are 2 x.
total Investment made is 20x/3+13x.=59x/3 rupees.
total pens bought are 3x.
they are sold at ₹118 per dozen.
SP=3x/12*118=59x/2 rupees.
SP>CP
profit=59x/6 rupees.
profit percentage=profit per CP*100=59x/6÷59x/3*100=
50%
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