There are at least x people in this group, according to the meaning of the question:

∵x is a positive integer,

∴ 1.6+0.55x≤0.7x，

Solution: x≥,

A: At least 1 1 students took part in the group photo.

List the inequalities with the average share of money per person not exceeding 0.7 yuan, and then find out the results.