A dependent event occurs when the outcome of one event affects the outcome of another event.
Let's analyze the options:
A. Picking 2 snacks from the pantry and replacing the first one before selecting another one.
- This is an independent event because replacing the first snack means that the second selection is not affected by the first.
B. Selecting a number from a set of number cards and putting it back because it was not an even number.
- This event is independent because you always replace the number, which means each selection does not affect the subsequent selections.
C. Riding your bike, given that it is a sunny day.
- This scenario does not involve two events where one affects the outcome of the other; it's more of a condition than a sequential event.
D. Picking 2 snacks from the pantry without looking and keeping the first one before selecting the second one.
- This is a dependent event because the outcome of selecting the second snack could be affected by what you chose first (e.g., if you keep the first snack, it reduces the options available for the second choice).
Therefore, the correct answer is:
D. picking 2 snacks from the pantry without looking and keeping the first one before selecting the second one.