Answer:
B. Two marbles are selected from a bag.
D. A coin is tossed and a card is chosen.
F. One student from each class is chosen to collect papers.
Explanation:
These situations are dependent events because the outcome of the second event is affected by the outcome of the first event. In situation B, the probability of selecting the second marble is affected by the removal of the first marble. In situation D, the probability of selecting the card is affected by the outcome of the coin toss. In situation F, the probability of selecting a student from a particular class is affected by the outcome of the selection from the previous class.