Answer:She would be expecting more 7th graders. ~ 78 7th graders ~72 8th graders
Explanation
7th Grade: 279÷25=11.16 11.16*7 (number on Friday for 7th grade)=78.12
8th grade=225÷25=9 9*8 (number on Friday for 8th grade) =72
Round each of them: 78.12=78 72=72
78 is higher than 72, therefore there will be more 7th graders