Answer:
8 trips
Explanation:
Divide 105 by 12 to find how many trips the train will take:
105/12
= 8.75
This means that the train will take 8 trips before it is Jill's turn. Since you can only have a whole number of trips, we have to round 8.75 down to 8.
So, the train will take 8 trips before it is Jill's turn.