A financial service has 500 clients enrolled, and the upper management wants to know whether the service it provides to affluent clients differs from the service it provides to lower-income clients. Each client is asked to rate his or her contact person at this financial institution. The classification of the service provided is A₁ = "outstanding", A₂ = "average", and A₃ = "poor". The income categories of the clients are B₁ = "under $50,000", B₂ = "$50,000 to under $100,000" and B₃ = "$100,000 or more". The results are shown in the table below.

Find:

a) P(B₁