Answer: Business motive
Explanation:
The primary motive for setting up private enterprises is strictly for profit , it equally believe in profit maximization in which it's a
market price taker i.e it takes the highest price available in the market.
Public enterprises can have diverse reasons for it's establishment, sometimes it's to provide essential services to the populace and it does not normally takes it's price from the market.
This explains some of the reasons for the price difference in the above analysis.