A Class Consists of 20 Sophomores and 15 Freshmen

question 88

Short Answer

A class consists of 20 sophomores and 15 freshmen. The club needs to choose four different members to be president, vice president, secretary, and treasurer.
(a) In how many ways is this possible?
(b) In how many ways is this possible if sophomores will be chosen as president and treasurer and freshmen as vice president and secretary?

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Definitions:

Working Memory

A cognitive system responsible for temporarily holding information available for processing, important for reasoning and the guidance of decision-making and behavior.

Long-Term Memory

The phase of the memory system that is capable of storing information for long periods of time, potentially indefinitely.

Semantic Memories

Memories of general knowledge, including facts, rules, concepts, and propositions.

Leaky Bucket

A concept often used in telecommunications and computing to describe a method of controlling data flow or managing available bandwidth.