Ashop is having a sale on t-shirts. if you buy the first t-shirt for $17, each additional t-shirt will cost $5. which formula models this situation?

an=17+(n-1)x5

an=5+(n-1)x17

an=22=(n-1)x5

an=(n-1)x17

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is