Answer:
33 1/3% profit
Step-by-step explanation:
Suppose Krishna buys 60 oranges at each price. At the first price, Krishna pays ...
60·(Rs 200)/10 = Rs 1200
At the second price, Krishna pays ...
60·(Rs 300)/12 = Rs 1500
At the selling price, Krishna receives ...
120·(Rs 450)/15 = Rs 3600
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Krishna has paid a total of 1200 +1500 = 2700 for the oranges, and sold them for 3600. His profit percentage is ...
(3600/2700 -1) × 100% = 33 1/3%