Question 363658
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Hi, 
75% of the graduating class had taken at least 8 math courses
"Of the remaining class members", 60% had taken 6 or 7 math courses.
60%* 25% = 15% of the graduating class had taken 6 or 7
15% + 75% = 90% had taken 6 or more math courses
10% of the graduating class fewer than 6