An experiment involves picking a card from the number cards 3, 5, 7, 9, 11. In equation form. What is the probability model for this experiment?

F(x)= (blank), where x=3, 5, 7, 9, 11

A. 1/5
B. 1/4
C. 1/2
D. 2/5

The probability model for this experiment is:

F(x) = 1/5, where x = 3, 5, 7, 9, 11

Therefore, the answer is A. 1/5.