A sociology professor has three sections of introductory sociology with 30, 25 and 20 students in section one, two and three respectively. Suppose the average score of the SEM 4 exam. is 65, 72 and 75 in section one, two and three respectively. What is the average score for all sections combined?
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Answer:
total number of students across all 3 sections = 75
section 1: total number secured = 30*65= 1950
section 2: total number secured = 25*72 = 1800
section 3: total number secured by= 20*75= 1500
total number secured by students across all 3 sections =
Step-by-step explanation:
1950+ 1800+ 1500= 5250
now required avg= 5250/75= 70
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