= 158÷7,
=22…4,
Then the number of people left in this group must be divided by 7 to leave 4.
Because 4+7= 1 1,
1 1+7= 18,
18+7=25,
…
So the number of people in the remaining group is 4, 1 1,18,25,
The group with 18 people in the table is 12;
A: The remaining group is 12.
Please adopt it.