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Annabelle, Abby, and Amelia are students in a class that has eight freshmen and twelve sophomores (including them). Three students are randomly selected from the

Annabelle, Abby, and Amelia are students in a class that has eight freshmen and twelve sophomores (including them). Three students are randomly selected from the class.

Find the probability that at least two sophomores are among the three students selected.

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