Answer:
umm lets seeeee
Step-by-step explanation:
290.6 backpacks per year
The average of 5 numbers is 1/5 of their sum:
average = (278 +310 +320 +242 +303)/5 = 290.6
The average number of backpacks given out in the last 5 years is 290.6, about 291.
I hope this helps you