hard · SAT Math
The two-way table below summarizes membership type and group-class attendance for all 150 members of Lincoln Fitness Center. In the table, x represents an unknown number of members. Membership | Group Classes | No Group Classes | Total Standard | x | 2x | 90 Premium | 45 | 15 | 60 Total | ? | ? | 150 What is the probability that a member selected at random from those who do NOT attend group classes regularly has a Premium membership?
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