Question: Suppose that past history shows that 60% of college students prefer Brand C cola. A sample of 5 students is to be selected.

1. The probability that exactly one prefers brand C is ________.
2. The probability that at least one prefers brand C is ________.
3. The probability that more than three prefer brand C is ________.
4. The average number that you would expect to prefer brand C is ______.
5. The variance of the number that prefer brand C is ________.

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