Please help, I’ll mark you as brainliest, it would be much appreciated

Solve for x, y, and z. show all steps.

What is the product? a-3/15a × 5/a-3

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