When a market has free entry and exit, there will likely be firms entering when profits are positive and exiting when they are negative.
A market is a system, institution, process, social relationship, or infrastructure configuration that parties exchange. Although parties can exchange goods and services through barter, most markets rely on sellers offering goods and services to buyers in exchange for money.
Marketplace. The means by which the exchange of goods or services takes place by contact between a buyer and a seller, either directly or through an intermediary or institution.
Businessmen tend to use the term 'market' to describe the group of individuals or organizations that make up the pool of actual and potential customers for a product or service.
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