Suppose Danielle is considering whether to see Zombie Revenge IV at her local movie theater. Tickets cost $10 each, but Danielle isn't sure how much she's going to like the movie. There's a 50 percent chance she'll get $25 worth of enjoyment from seeing the movie, and there's a 50 percent chance she'll only get $10 worth of enjoyment from seeing the movie. Danielle's expected value of seeing the movie is

Multiple Choice

$0.

$20.

$12.50.

$7.50.