Apopulation of a certain city decreased from 240,000 in 1985 to 210,000 in 1995 what is the percentage decrease in the population?

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