Physics, 15.11.2019 20:31 tateandvioletAHS14AY

Period 1 has 15 students in it and a test average of 86%. period 2 has 21 students in it and an average of 88%. period 3 has 12 students in it and an average of 95%. use weighted means to find the overall average of the classes.
87.3%
88.7%
89.1%
91%

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Period 1 has 15 students in it and a test average of 86%. period 2 has 21 students in it and an aver...