In how many ways can a class of 30 students select a


In how many ways can a class of 30 students select a committe from the class that consists of a president, a vice president, a treasurer, and a secretary A. if any student may serve either of these roles but no student may serve in multiple roles and B. if any student may serve in multiple roles?

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Electrical Engineering: In how many ways can a class of 30 students select a
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