Final answer:
The statement about the Misfit and his henchmen stumbling upon the grandmother and her family in Tennessee is false; the encounter occurs on a rural road in Georgia during the family's trip to Florida.
Step-by-step explanation:
In Flannery O'Connor's short story 'A Good Man is Hard to Find', the claim that the Misfit and his henchmen stumble upon the grandmother and her family at an old house in Tennessee is false. Instead, the family, while on a vacation to Florida, have a car accident and encounter the Misfit and his henchmen while on a desolate rural road.
This encounter does not happen in Tennessee, nor at an old house, but in the outskirts of Georgia, where much of O'Connor's fiction is set.
The statement in the question is partially true. In Flannery O'Connor's 'A Good Man is Hard to Find,' the Misfit and his henchmen do stumble upon the grandmother and her family, but it is not at an old house in Tennessee.
The family encounters the Misfit when they have a car accident and end up in a ditch alongside the road. The Misfit and his gang happen to come by and find them there.