Suppose your friends have the following ice cream flavor preferences:

70% of your friends like Chocolate (C). The remaining do not like Chocolate.
40% of your friends like Sprinkles (S) topping. The remaining do not like Sprinkles.
25% of your friends who like Chocolate (C) also like Sprinkles (S).
Of the friends who like Chocolate, which of the following probabilities do you need to find in order to determine the proportion of friends who like Chocolate that also like Sprinkles?

P(C)
P(S)
P(C and S)
P(C | S)
P(S | C)