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#13594

statistics

data analysis

average

hard

120 sec

Data set P contains 80 student test scores with a mean score of 15. Data set Q contains 120 student test scores with a mean score of 30. If data set R is formed by combining the scores from data set P and data set Q, what is the mean score of data set R?

• 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.