Given that,
20 students are in a class, and the teacher wants to break them into groups of four for a project.
Since the same student can be a leader for more than one group, there are no restrictions on who can be chosen as the leader for each group.
Therefore, for each group, we have 20 choices for the leader. Since there are 4 groups, the total number of ways to choose the leaders for each group is given by,
Therefore, there are 160000 different ways to choose the leaders for each group if the same student can be a leader for more than one group.
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