Question: 8. An IRS inspector randomly selects five persons from a group of 20 who are potential candidates to be audited. Of the 20 persons, nine

8. An IRS inspector randomly selects five persons from a group of 20 who are potential candidates to be audited. Of the 20 persons, nine were audited in the past, while the other 11 have never been audited before. Find the probability that the number of persons selected who were audited in the past is

(a) exactly three,

(b) more than two,

(c) at least two,

(d) at most three.

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