If the cost, C, for manufacturing x units of a certain products is given by C=x2-10x+70, find the number of units manufactured at a cost of 13,270

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