there are 60 people in a teamwork and cooperation class offered on weekends at work. the class is divided…

there are 60 people in a teamwork and cooperation class offered on weekends at work. the class is divided into 4 groups. each groups average test score is given in the chart. what was the average score for the whole class? teamwork and cooperation student groups group a group b group c group d 30% of class 40% of class 25% of class 5% of class avg score 96 avg score 87 avg score 75 avg score 72 a) 83% b) 84% c) 86% d) 87%

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