Statistics & Data ScienceHardMiddle Stage (6–8)High School (9–10)High School (11–12)UndergraduateGeneralStatistics Basics › Averages: Mean, Median and Mode
Created by StemPy LabA coaching centre has a morning batch of 20 learners, whose mean mark is 60, and an evening batch of 30, whose mean mark is 70. What is the mean mark of all 50 learners?
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