Question

A shopkeeper bought a certain number of identical books at ₹120 each. He sold: 30% of them at a profit of 25% each, 40% of them at a profit of 10% each, and the remaining books at a loss of 20% each. His overall profit was ₹990. How many books did he buy?

A 120
B 100
C 150
D 200
E None of these
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