You are randomly picking a number between 1 and 20, inclusive. What is the probability of selecting a number greater than or equal to 17?

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