Helen is helping plan a trip for three classes at her son's school. School rules say that classes on trips must have 1 adult for every 6 children. One has 26 children; and the third has 28 children. Each class has 1 teacher. How many OTHER adults are needed for the trip?

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7

thats not one of the choices

28+26=54
54/6=9
9-2 teachers = 7

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