Let's look at this logically:
-There's no reason for a Jaguar to be anyone's favorite
-Some people have chosen the Jaguar as their favorite
Therefore, there is there must be some fraction of people who are answering randomly. We'll assume that the people who choose randomly choose each option with equal probability.
-At this time we see 4/22 people have chosen "Jaguar" as their favorite.
-There are 5 different choices for the poll
Therefore 4/22*5 should give us the fraction of people who are choosing randomly. This comes out to approximately 90%.
QED
