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#31140

average

statistics

data analysis

hard

90 sec

A company has two production lines. Line A produced 20 units with an average defect rate of 15%. Line B produced an unknown number of units, but its average defect rate was 25%. If the combined average defect rate for all units produced by both lines was 20%, how many units did Line B produce?

• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-).
• Fractions must be in lowest terms.
• Mixed numbers must be converted to improper fractions.