Question: A survey of those using a particular statistical software system indicated that 10% were dissatisfied. Half of those dissatisfied purchased the system from vender A.

A survey of those using a particular statistical software system indicated that 10% were dissatisfied. Half of those dissatisfied purchased the system from vender A. It is also known that 20%> of those surveyed purchased from vendor A. Given that the software package was purchased from vendor, 4, what is the probability that that particular user is dissatisfied?

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