The College Copy Shop is in process of purchasing a high-tech copier. In their search, they have gathered the following information about two possible copiers A and B. 
(a) Compute expected rate of return for each copier.
(b) Compute variance and standard deviation of rate of return for each copier.
(c) Which copier should they purchase?
Definitions:
Topic Sentence
A sentence that expresses the main idea of the paragraph in which it occurs, serving as a summary or introduction to the content that follows.
Walt Disney
An American film producer, director, screenwriter, voice actor, and animator, founder of The Walt Disney Company.
Oswald The Rabbit
An early animated cartoon character created by Walt Disney and Ub Iwerks, predating Mickey Mouse and known for its significance in animation history.
Greek Myth
A collection of stories belonging to the ancient Greeks concerning their gods and heroes, the nature of the world, and the origins and significance of their religious practices.
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