400 custard apples were bought at ₹1200 per hundred and were sold at a profit of ₹900. Find the selling price (in ₹) per dozen of custard apples.
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Correct answer: A
Explanation
The correct answer is option 1 i.e. 171 .
Cost price of 100 apples = ₹1200
Cost price of 400 apples = 1200 × 4 = ₹4800
Profit = ₹900
Selling price of 400 apples = 4800 + 900 = ₹5700
Number of dozens = 400 ÷ 12 = 100/3 dozens
Selling price per dozen = 5700 ÷ (100/3) = 5700 × 3/100 = 171