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The probability of a randomly selected person having a GPA of 8.5 or above in all subjects is 0.25.

a. If two students are chosen randomly and independently, what is the probability that they both have a GPA of 8.5 or above?

b. If two students are selected from the same high school statistics class, do you think the probability of their both having a GPA of 8.5 or above is different from your answer to part a? Explain.

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