A trustee of a company's pension plan has solicited the employee's feelings toward a proposed revision of the plan. A breakdown of the responses is shown in the accompanying table. Suppose that an employee is selected at random. DecisionBlue-collarWorkers (B) White-collarWorkers (W) Managers (M)For (F)673211Against (A) 63189 The probability that the employee selected is against the proposed revision:
a) 0.45
b) 0.5231
c) 0.495
d) 0.55