professor teaches 3 sectionof introductory

a professor teaches 3 sectionof introductory stats.

resultsof the midterm :

section # students writing exams mean gradeof students writing exams(%)

1 50 55

2 30 68

3 20 75

calculate the combinedgradeof all the students writing exams

plse respond ASAP thanks

Recall that mean = sum of scores divided by number of scores ⇒ sum of scores =frequency * meanSum of scores of class 1 = 5055 = 2750Sum of scores of class 2 = 3068 = 2040Sum of scores of…

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