A trader bought 50 pairs of trousers for 1500 naira and sold each PS4 45 naira what is his profit on each pair of the trousers?
The cost price of 1 pair of trousers is 1500 naira / 50 pairs = 30 naira.
The selling price of 1 pair of trousers is 45 naira.
Therefore, the profit on each pair of trousers is 45 naira - 30 naira = 15 naira. Answer: \boxed{15}.
To calculate the profit on each pair of trousers, we need to find the difference between the selling price and the cost price.
The cost of buying 50 pairs of trousers is 1500 naira, so the cost price per pair is 1500 naira / 50 pairs = 30 naira per pair.
The selling price for each pair is 45 naira.
To calculate the profit per pair, we subtract the cost price from the selling price:
Profit per pair = Selling price - Cost price
= 45 naira - 30 naira
= 15 naira.
Therefore, the profit on each pair of trousers is 15 naira.