Computer keyboard failures are due to faulty electrical connects (20%) or mechanical defects (80%). Mechanical defects are related to loose keys (27%) or improper assembly (73%). Electrical connect defects are caused by defective wires (37%), improper connections (13%), or poorly welded wires (50%). (a) Find the probability that a failure is due to loose keys. (b) Find the probability that a failure is due to improperly connected or poorly welded wires.

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Computer keyboard failures are due to faulty electrical connects (20%) or mechanical defects (80%). Mechanical
defects are related to loose keys (27%) or improper assembly (73%). Electrical connect defects are caused by defective
wires (37%), improper connections (13%), or poorly welded wires (50%).
(a) Find the probability that a failure is due to loose keys.
(b) Find the probability that a failure is due to improperly connected or poorly welded wires.
Transcribed Image Text:Computer keyboard failures are due to faulty electrical connects (20%) or mechanical defects (80%). Mechanical defects are related to loose keys (27%) or improper assembly (73%). Electrical connect defects are caused by defective wires (37%), improper connections (13%), or poorly welded wires (50%). (a) Find the probability that a failure is due to loose keys. (b) Find the probability that a failure is due to improperly connected or poorly welded wires.
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