Chamanlal purchased 20 dozen note books @ Rs.48 per dozen. He sold 8 dozen at 10% profit and the remaining12 dozens with 20% profit. What is the profit percentage in this transaction?
A). 2 %
B). 4 %
C). 8 %
D). 16 %
16 %
Total cost price = 20 × 48 = Rs.960/-
Amount of first selling = 8 × Rs.52.80 = Rs.422.40
Amount of second selling = 12 × Rs.57.60 = Rs.691.20
Total selling price = 422.40 + 691.20 = Rs.1113.60
Profit = 1113.60 – 960 = Rs.153.60
Therefore profit per cent in this transaction = 153.60 × 100/960 = 16%.
5. What is the net discount (in %) for successive discounts of 10% and 20%?