50 have COVID: 48.5 test positive (true positives), 1.5 test negative - 950 don't have COVID: 4.75 test positive (false positives), 945.25 test negative - Total positive tests: 53.25 - True positives: 48.5/53.25 ≈ 91.1% - False positives: 4.75 (less than 5 people wrongly excluded)