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Quality assurance is an important aspect of any business. This case study is based on Lyman Limited, a company that manufactures and sells office furniture. They obtain their parts (hinges, chair wheels, etc.) from three different suppliers, A, B and C. Past experience has shown that 20% of the parts are supplied by A, 50% are supplied by B and the rest are supplied by C. It is also known that 10% of the parts supplied by A are defect, 8% of the parts from B are defect and 6% of the parts from C are defect. A part is randomly selected during a quality assurance test and is found to be defective. Calculate the probability that it was supplied by supplier B

Quality assurance is an important aspect of any business. This case study is based on Lyman Limited, a company that manufactures and sells office furniture. They obtain their parts (hinges, chair wheels, etc.) from three different suppliers, A, B and C. Past experience has shown that 20% of the parts are supplied by A, 50% are supplied by B and the rest are supplied by C. It is also known that 10% of the parts supplied by A are defect, 8% of the parts from B are defect and 6% of the parts from C are defect. A part is randomly selected during a quality assurance test and is found to be defective. Calculate the probability that it was supplied by supplier B

Practical Management Science
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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Quality assurance is an important aspect of any business. This case study is based on Lyman Limited, a
company that manufactures and sells office furniture. They obtain their parts (hinges, chair wheels, etc.) from
three different suppliers, A, B and C. Past experience has shown that 20% of the parts are supplied by A, 50%
are supplied by B and the rest are supplied by C. It is also known that 10% of the parts supplied by A are defect,
8% of the parts from B are defect and 6% of the parts from C are defect.

A part is randomly selected during a quality assurance test and is found to be defective. Calculate the
probability that it was supplied by supplier B.

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