Ten students are to be selected for a project from a class of 30 students. There are 4 students who want to be together either in the project or not in the project. Find the number of possible selections.
|Case I||Case II|
|4 Students are in||4 Students are out|
|Number of ways = 26C6||Number of ways = 26C10|
Required number = 26C6 + 26C10
Concept: Concept of Combinations
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