Answer:
the shopkeeper earned a profit of 10% on the transaction
Explanation:
The shopkeeper bought 150 oranges at a rate of Rs. 8 each, which means the total cost of buying those 150 oranges is:
150 oranges x Rs. 8 per orange = Rs. 1200
Out of those 150 oranges, 30 were rotten, which means the shopkeeper sold 120 oranges at a rate of Rs. 11 each. The total revenue earned from selling those oranges is:
120 oranges x Rs. 11 per orange = Rs. 1320
The profit or loss of the shopkeeper can be calculated as the difference between the revenue and cost:
Profit or loss = Revenue - Cost
Profit or loss = Rs. 1320 - Rs. 1200
Profit or loss = Rs. 120
Since the shopkeeper made a profit of Rs. 120, the profit percentage can be calculated as follows:
Profit percentage = (Profit / Cost) x 100
Profit percentage = (120 / 1200) x 100
Profit percentage = 10%
Therefore, the shopkeeper earned a profit of 10% on the transaction.