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#7668

statistics

data analysis

arithmetic mean

average

word problem

medium

75 sec

Calculator OK

Data set P consists of the weights of 40 packages and has a mean of 50 kilograms. Data set Q consists of the weights of 60 packages and has a mean of 70 kilograms. Data set R consists of the weights of the 100 packages from data sets P and Q. What is the mean, in kilograms, 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.