Incoming calls to a customer service center are clas ed as complaints (75% of call) or requests for informat 25% of calls). Of the complaints, 40% deal with compu quipment that does not respond and 57% deal w complete software installation; and in the remaining 3% omplaints the user has improperly followed the installat astructions. The requests for information are evenly divi n technical questions (50%) and requests to purchase m roducts (50%). ) What is the probability that an incoming call to the c tomer service center will be from a customer who has : followed installation instructions properly? p) Find the probability that an incoming call is a request purchasing more products.

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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2-77. Incoming calls to a customer service center are classi-
fied as complaints (75% of call) or requests for information
(25% of calls). Of the complaints, 40% deal with computer
equipment that does not respond and 57% deal with
incomplete software installation; and in the remaining 3% of
complaints the user has improperly followed the installation
instructions. The requests for information are evenly divided
on technical questions (50%) and requests to purchase more
products (50%).
(a) What is the probability that an incoming call to the cus-
tomer service center will be from a customer who has not
followed installation instructions properly?
(b) Find the probability that an incoming call is a request for
purchasing more products.
Transcribed Image Text:2-77. Incoming calls to a customer service center are classi- fied as complaints (75% of call) or requests for information (25% of calls). Of the complaints, 40% deal with computer equipment that does not respond and 57% deal with incomplete software installation; and in the remaining 3% of complaints the user has improperly followed the installation instructions. The requests for information are evenly divided on technical questions (50%) and requests to purchase more products (50%). (a) What is the probability that an incoming call to the cus- tomer service center will be from a customer who has not followed installation instructions properly? (b) Find the probability that an incoming call is a request for purchasing more products.
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