Zener Cards Are Often Used to Test the Psychic Ability

Zener cards are often used to test the psychic ability of individuals. In the Zener deck, there are five different patterns displayed and each has a 1/5 probability of being drawn from a well-shuffled deck. The five patterns are: circle, plus sign, wavy lines, empty box, and star. One hundred trials were conducted, and your very impressive friend guessed right on 41 of those trials. What proportion of the cards would I expect my friend to guess correctly?

A) 0%
B) 20%
C) 80%
D) 100%