Answer:
For the boys' team, the tallest kid is 84 inches while the shortest is 75 inches making the range 9.
For the girls, the tallest is 75 inches tall while the shortest is 66, making the range 9.
Both the boys and the girls have a range of 9 but together, with the tallest boy and the shortest girl, the range is 18 inches.
Hope this helps! Have a nice day!