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[6 marks] ( Lecture 4 )A class has 8 students. In the first class: The lecturer wants each student to introduce him/herself. How many different

[6 marks](Lecture 4)A class has 8 students. In the first class:
The lecturer wants each student to introduce him/herself. How many different ways to order the students in the self-introduction?
The lecturer randomly selects three students to answer a question. How many different ways to select the three students?

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