A man bought two packets of toffees, the same number in each. the first, he bought at 5 paise each, but the second at 3 for 13 paise. he then mixed them all together and sold them at 70 paise a dozen. his gain is
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cost of toffee of type a =5p
cost of 6 toffees=6×5=30p
cost of 3 toffees of type b=13p
cost of 6 toffee=13×2=26p
total cost=30+26=56p
sp=70p
gain= 70-56=14p
cost of 6 toffees=6×5=30p
cost of 3 toffees of type b=13p
cost of 6 toffee=13×2=26p
total cost=30+26=56p
sp=70p
gain= 70-56=14p
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