Question

Which pair of events is dependent?
You get a head and a tail in two coin tosses with two different coins.
You get a head and a tail in two coin tosses using the same coin twice.
You pick two numbered billiard balls from a bag of balls one after the other without replacement.
You draw two red cards one after the other with replacement.

Answer 1

A -- "two different coins" so it's independent
B -- "same coin twice" well coins don't have memory so it's still independent
C -- "without replacement" so the state before the first pick and before the second pick are different
D -- "with replacement" this solves the problem so it's independent

Answer 2

Get it?

Answer 3

Yes thanks so much.

Answer 4

No problem at all.