Nandlal about 20 dozen notebook at 156 per dozen he sold it doesn't of them at 10% gain and remaining 12 dozen at 20% gain what is is gained person in the whole transaction
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Nandlal bought 20 dozen Notebooks at Rs.156 per dozen
Total purchasing price =156×20
=3120
He sold 8 dozen at 10% profit + 12 dozen at 20% profit
[156×8+
100
156×8×10
]+[156×12+
100
156×12×20
]
⇒1248+
10
1248
+1872+
10
3744
⇒
10
3120+1248+3744
⇒3619.20
So selling price =3619.2
profit = selling price -purchasing price
=3619.2−3120
=499.2
profit %=
3120
499.2×100
=16% Ans
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