Answer:
19%
Step-by-step explanation:
We assume that the class has to have a president. So the chances of none of the candidates winning is 0%. In turn we expect that one of the candidates will win the elections, therefore the chances of someone winning is 100%. Therefore the chances of the third candidate winning can be calculated by removing the chances of the other two candidates winning
P(third candidate winning) = 100% - (37%+44%) = 19%