What is the probability that the customer’s reason for complaint is not mechanic

Question

What is the probability that the customer’s reason for complaint is not mechanical? Round your answer to three decimal places.

What is the probability a customer complained during the guarantee period? Round your answer to three decimal places.

What is the probability that a customer complained about an electrical problem or a mechanical problem? Round your answer to three decimal places.

What is the probability the customer complains about the appearance of the product given that it was during the guarantee period? Round your answer to three decimal places.

Reason for Complaint Complaint Origin During Guarantee perio 540 390 960 660 90

Explanation / Answer

Solution:

( a )

probability that the customer’s reason for complaint is not mechanical = (900+1050)/3000 = 0.650

( b )

probability a customer complained during the guarantee period = 1890 / 3000 = 0.630

( c )

probability that a customer complained about an electrical problem or a mechanical problem = (900+1050)/3000 = 0.650

( d )

number of customers complained during guarantee period = 1890

number of customers complained who complaine during guarantee period is about appearance = 960

probability the customer complains about the appearance of the product given that it was during the guarantee period = 960 / 1890 = 0.5079

Complaint origin Electrical Mechanical Appearance Total During Guarantee period 540 390 960 1890 After Guarantee period 360 660 90 1110 Total 900 1050 1050 3000

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