Rhianna picks a marble at random. Without putting the first marble back, she picks a second marble at random.

Question

Are these two events dependent or independent?

Answer 1

The two events in this scenario are dependent events.

In probability, two events are considered dependent if the outcome of one event affects the outcome of another. In this case, since Rhianna does not put the first marble back into the container, the total number of marbles available for the second pick is reduced, which means the outcome of the first pick affects the second pick. Therefore, these events are dependent.