The dependent events are:
Two events are dependent when the outcome of the first event affects the probabilities for the outcomes of the second event.
The first pair:
"choosing 2 socks from a drawer, without replacement"
Is a pair of dependent events. Because the first pair chosen can't be chosen on the second event. Then, the outcome of the first event affects the second event.
The third option:
"picking 4 cards from a deck, one after the other"
Again, here we have dependent events, because the cards already picked can't appear in the next events.
The other 3 options are sets of independent events.
If you want to learn more about dependent events:
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