In a class,20 students are1.15m tall,15students1.20m tall and 5 students are1.25 m tall.what is the average height of the students in the class?
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20×1.15 = 23.0m
15×1.20 = 18m
5×1.25 = 6m
average = 23+18+6 /40 = 47/40
15×1.20 = 18m
5×1.25 = 6m
average = 23+18+6 /40 = 47/40
aprilhilliard25:
47.3m
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3
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