Question

Which are dependent events? Check all that apply.

choosing 2 socks from a drawer, without replacement
flipping a coin 4 times
picking 4 cards from a deck, one after the other
rolling a number cube twice
spinning a spinner and rolling a number cube

Answer 1

Dependent:
- choosing 2 socks from a drawer, without replacement
- picking 4 cards from a deck, one after the other (assumed without replacement)

Reason: without replacement the outcome of the first draw changes the probabilities for the next draws.

Independent:
- flipping a coin 4 times
- rolling a number cube twice
- spinning a spinner and rolling a number cube

(These are independent because each trial does not change the probabilities of the others.)