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7-46) Calculate 7-47) Calculate  7-48) The 7th graders' average height in Walnut Creek School for the girls is 54 inches. The average height for the boys is 55 inches. If the ratio of girls to boys is 7 to 6, what is the average height of all the students? 7-49) A 7th grade class took a science test.  The average score for the boys is 81 points.  The average score for the girls is 82 points.  If the ratio of girls to boys in the class is 4 to 5, what is the average test score for all of the students? 7-50) At Jefferson School, both 6th grade and 7th grade classes took a math test. The average score for the 6th grade is 80 and for the 7th grade is 90. If there are twice as many students in the 7th grade as that in the 6th grade, what is the average test score for both grades together? More challenging math problems for seventh grade:
1-5   6-10   11-15   16-20   21-25   26-30   31-35  36-40  41-45  46-50   51-60
61-70
71-80  81-90