ISOM 111 L7L8, Fall 2010
1
Homework 2
Due: Wednesday, Oct 6, 4:00pm
Submit to the “ISOM 111 L7L8 Homework Collection Box” outside Room 4351
I.
At a large assembly line, the manufacturer reassigns employees to different tasks each month.
This keeps the workers from getting bored by endlessly repeating the same task. It also lets them see
how the work done in different stages must fit together. It is known that 55% of the employees have
less than or equal to two years of experience, 32% have between three and five years of experience,
and the rest have more than five years of experience. Assume that teams of three employees are
formed randomly. Dave works at this assembly line.
(a) Consider one of Dave’s teammates. What is the probability that this teammate has
(a.1) two or fewer years of experience?
(a.2) more than five years of experience?
(b) What is the probability that, considering both of Dave’s two teammates,
(b.1) both have more than two years of experience?
(b.2) exactly one of them has more than five years of experience?
(b.3) at least one has more than five years of experience?
II.
A product is assembled using 10 different components, each of which must meet specifica
tions for five different quality characteristics. Suppose that there is a .9973 probability that each
individual specification will be met.
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 Spring '11
 Hong
 Continental Airlines, Alaska Airlines, America West, America West Airlines

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