A group of 21 people went to the county fair with 9 people on a stagecoach and 3 people in each buggy. On the return trip, 4 people rode in each buggy. How many people returned on the stagecoach?
To trip
Total people in the group = 21
People went on the stagecoach = 9
People went on the buggy = 21-9 = 12
As 3 people went in each buggy, number of buggy = 12/3 = 4
Return trip
As 4 people rode in each buggy, total number of people = 4*4 = 16
People rode on the stagecoach = 21-16 = 5
5 people returned on the stagecoach.
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