oranges are bought at 6 for rs10 and sold at 4 for rs 9. find the gain or loss per cent.

Your questions are all the same. Read my reply to the first one and then do the rest;.

27/20

17/20

35%

To find the gain or loss percentage, we need to compare the cost price and the selling price.

Cost price can be calculated by dividing the total amount spent on buying oranges by the number of oranges bought. In this case, we are given that 6 oranges cost Rs. 10. Therefore, the cost price of each orange is (10/6) = Rs. 1.67.

Selling price can be calculated by dividing the total amount earned from selling oranges by the number of oranges sold. In this case, we are given that 4 oranges are sold for Rs. 9. Therefore, the selling price of each orange is (9/4) = Rs. 2.25.

Now, to calculate the gain or loss percentage, we can use the following formula:

Gain or Loss % = ((Selling Price - Cost Price) / Cost Price) * 100

Substituting the values, we get:

Gain or Loss % = ((2.25 - 1.67) / 1.67) * 100

Calculating further:

Gain or Loss % = (0.58 / 1.67) * 100

Gain or Loss % = 34.73%

Therefore, the gain or loss percentage is approximately 34.73%.