In a particular university, there is a 25% chance that a randomly selected student is either a master's student or a senior. If randomly selecting another student, what is the probability that it is not the case that they are either a master's student or a senior? Assume Event A: They are a master's student; Event B: They are a senior.

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A: Given Information: Sample size (n) = 22  Mean (u) = 12 Standard deviation (s) = 5.4

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