Exit poll data can only be used this way if exit polls are mandatory, which they are not.
Exit polls are self-selecting, and statistically useless for mathematical proofs like this.
However, I suspect in a couple days this is going to produce a smashing edition of the DUmmy FUnnies!
49/11360 = 0.4%
Yep, self-selected surveys of less than half of one percent of the voters are a better indicator than counting the votes of everyone.