1) A variable uses a geometric distribution if:
The variable is number of failures before the first success.

Each draw is independent of the previous ones

2)(a) Not geometric, because it contains the number of failures before the first TWO successes.

(b) Not geometric, because the cards are not being replaced.

(c) Geometric

(d) Not geometric, counts the number of successes instead of the number of failures before the first success.

(e) Not geometric, counts the number of successes instead of the number of failures before the first success.

Each draw is independent of the previous ones

2)(a) Not geometric, because it contains the number of failures before the first TWO successes.

(b) Not geometric, because the cards are not being replaced.

(c) Geometric

(d) Not geometric, counts the number of successes instead of the number of failures before the first success.

(e) Not geometric, counts the number of successes instead of the number of failures before the first success.