The quality control department at a widget factory pull a sample of 3,250 widgets to check for defective parts. Let the following subjects be defined. Group 1: widgets that have a defective bearing. Group 2: widgets that have surface flaws. 612 widgets in the samples are found to have a defective bearing, and 535 are found to have surface flaws. Among the widgets with defective bearing, 112 did not have surface flaws.elements in both Group 1 and Group 2 D S elements in Group 2 but not Group 1 D' S elements in Group 1 or Group 2 D S elements in neither Group 1 nor Group 2 (D S)