Answer:
Events are not disjoint
Explanation:
Let A represents an event that 62% of families living in a certain country own a minivan and B represents an event that 16% own a truck.
As events A and B are not disjoint, so the addition rule does not imply that 78 %of families own either a minivan or a truck.
There may be some families who owe both minivans and trucks.
