Aticket to the state fair cost $15. the equation y = 15x relates the total cost of tickets (y) to the number of tickets purchased (x). identify the unit rate in the equation.

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?