A Decision tree is a classification Scheme which generates a tree and set rules, representing the model of different classes, from a given data set. A decision tree can be used to clarify and find an answer to a complex problem. The structure allows users to take a problem with multiple possible solutions and display it in a simple, easy-tounderstand format that shows the relationship between different events or decisions. The furthest branches on the tree represent possible end results. There are three decision tree algorithms are used to make the decision efficiently. Those are ID3, ASSISTANT and C4.5.