Answer
Total convicted felons in the database = 4,500,000
Demonstrated match between DNA and hair = 1/1,600,000
Individuals that have match = 4,500,000 x 1/1,600,000
= 2.8125 $\approx$ 3
Hence, 3 persons show a match between DNA and hair.
Work Step by Step
Total convicted felons in the database = 4,500,000
Demonstrated match between DNA and hair = 1/1,600,000
Individuals that have match = 4,500,000 x 1/1,600,000
= 2.8125 $\approx$ 3
Hence, 3 persons show a match between DNA and hair.
