At Hogwarts School of Witchcraft and Wizardry, the Sorting Hat chooses one of four houses for each
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At Hogwarts School of Witchcraft and Wizardry, the Sorting Hat chooses one of four houses for each first-year student. If 4 students are randomly selected from 16 available students (including Harry Potter), what is the probability that they are the four youngest students?
Express all probabilities as fractions.
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