A manufacturer of DVD players purchases a particular

microchip, called the LS-24, from three

suppliers: Hall Electronics, Schuller Sales, and Crawford Components. Thirty

percent of the LS-24 chipsarepurchasedfromHallElectronics,20 percent from Schuller

Sales, and the remaining 50 percent from Crawford Components. the manufacturer

has extensive histories on the three suppliers and knows that 3percent of the

LS-24 chips from Hall Electronics are defective, 5 percent of chips from Schuller.

Sales are defective, and 4 percent of the chips purchased from Crawford

Components are defective. When the LS-24

chips arrive at the manufacturer, they

are placed directly in a bin and not inspected or otherwise identified by supplier. A worker selects a chip for installation

in a DVD player and finds it defective. What is the probability that it

was manufactured by Schuller Sales?