If T consist of 500000 transactions, 20000 transaction contain bread, 30000 transaction contain jam, 10000 transaction contain both bread and jam. Then the support of bread and jam is _______.

Data mining vs Data warehouse:
Data mining is the process of determining data patterns. A data warehouse is a database system designed for analytics.

Data mining is the process of extracting useful data from a large set of data. Data warehousing is the process of combining all the relevant data.

We use a data warehouse to support management functions, and we use data mining to extract useful information and patterns from data.