100 oranges were bought for 2 naira fifty kobo. They were all sold at 2 kobo each. How much did the seller lose?
The total cost of buying the 100 oranges was 100 * 2.50 = 250 naira.
The total selling price of the 100 oranges is 100 * 0.02 = 2 naira.
Therefore, the seller lost 250 - 2 = 248 naira. Answer: \boxed{248}.
To find out how much the seller lost, we need to calculate the cost of buying the oranges and compare it to the amount gained from selling them.
Step 1: Calculate the cost of buying the oranges:
100 oranges were bought for 2 naira fifty kobo.
To convert 2 naira fifty kobo into kobo:
2 naira = 200 kobo
50 kobo = 50 kobo
Total cost = 200 kobo + 50 kobo = 250 kobo.
Step 2: Calculate the total amount gained from selling the oranges:
100 oranges were sold at 2 kobo each.
Total amount gained = 100 oranges * 2 kobo/orange = 200 kobo.
Step 3: Calculate the loss:
Loss = cost - amount gained
Loss = 250 kobo - 200 kobo = 50 kobo.
Therefore, the seller lost 50 kobo.
To find out how much the seller lost, we'll need to calculate the cost of buying the oranges and compare it to the total revenue from selling them.
First, let's calculate the total cost of buying the oranges. We know that 100 oranges were bought for 2 naira fifty kobo.
To convert kobo to naira, we divide by 100 (as 100 kobo equals 1 naira).
2 naira fifty kobo is equivalent to 2.50 naira.
Next, let's calculate the revenue from selling the oranges. We know that each orange was sold for 2 kobo.
Since 100 oranges were sold, the total revenue can be calculated by multiplying the price per orange by the quantity sold: 2 kobo * 100 = 200 kobo.
To convert kobo to naira, we divide by 100 (as 100 kobo equals 1 naira).
Thus, the total revenue from selling the oranges is 2 naira.
Now, let's compare the cost of buying the oranges to the revenue from selling them.
The total cost of buying the oranges is 2.50 naira, and the total revenue from selling them is 2 naira.
To find out how much the seller lost, we subtract the total revenue from the total cost: 2.50 - 2 = 0.50 naira.
Therefore, the seller lost 0.50 naira.