In bright primary school, students in Class One hand in 89 grams of plastic products every day. According to this calculation, the same class is the same.
( 1)(89+ 1 12+99)÷3
=300÷3
= 100 (yuan)
A: The average donation per group is 100 yuan.
(2)(89+ 1 12+99)÷(9+ 1 1+ 10)
=300÷30
= 10 (yuan)
A: The average donation per person 10 yuan.