Question

Question 9

A manufacturer of cell phones purchases a microchip called the LS-24, from three suppliers: Hall Electronics, Schuller Sales, and Crawford Components. Forty-Five percent of the LS-24 chips are purchased from Hall Electronics, 30% from Schuller Sales, and the remaining 25% from Crawford components. The manufacturer has extensive histories on the three suppliers and knows that 3% of the LS-24 chips from Hall Electronics are defective, 6% of the chips from Schuller Sales are defective, and 4% of the chips purchased from Crawford Components are defective.

When the LS-24 chips arrive from the three suppliers, they are placed directly in a bin and not inspected or otherwise identified by supplier. A worker selects a chip for installation and finds it defective. What is the probability that it was manufactured by Hall Electronics?  

	a.	.3235
	b.	0.50
	c.	.241
	d.	.4337

Answer 1

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