Students in the 7th and 9th grades were surveyed about whether they participate in a school sport. Some of the survey results are listed here.

50 of the 250 students surveyed participate in a school sport.
Of the 90 students in 7th grade, 72 of them do not participate in a school sport.
32 of the 9th-grade students participate in a school sport.
128 of the 9th-grade students do not participate in a school sport.

This information is shown in the two-way frequency table below. Drag numbers into the empty spaces to complete the table.