[50] Anu bought oranges at the rate of 10 for Rs.40 and sold them at the rate of 15 for Rs.75. How many

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Anu bought oranges at the rate of 10 for Rs.40 and sold them at the rate of 15 for Rs.75. How many oranges should be sold to make a net profit of Rs.50?

Explanation:
From question we know CP of 10 oranges = 40
Therefore, CP of 1 orange = 40/10 = Rs.4
And, SP of 15 oranges = 75
So, SP of 1 orange = 75/15 = Rs.5
By formula, Profit for 1 orange = SP – CP = 5 – 4 = 1
To calculate the number of oranges required so that Anu makes Rs. 50 as total profit, we can use the direct proportion table method as follows
Oranges Profit 1 Rs. 1 X Rs. 50 Since number of oranges and profit will be in direct proportion, we can write:

Oranges	Profit
1	Rs. 1
X	Rs. 50

Therefore, she needs to sell 50 oranges to make profit of Rs. 50.

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