If Brian has a 50% chance of getting a job, and that job would either be at IBM or AT&T, what is the probability that he will soon be working at IBM?
a. .50 ÷ 2 = .25
b. .50 – p(AT&T)
c. .50 – p(IBM)
d. .50 ÷ p(AT&T)
B
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