In a population where 25% of voters prefer Candidate A, an organization conducts a poll of 1616 voters. Find the probability that 0 of the 16 voters will prefer Candidate A.

In a large population, 62 % of the people have been vaccinated. If 4 people are randomly selected, what is the probability that AT LEAST ONE of them has been vaccinated? Give your answer as a decimal (to at least 3 places) or fraction.

Steve has 12 biscuits in a tin. There are 5 digestive and 7 chocolate biscuits. Steve takes two biscuits at random from the tin. Work out the probability that he chooses two different types of biscuits.

Assume that when adults with smartphones are randomly​ selected, 39​% use them in meetings or classes. If 25 adult smartphone users are randomly​ selected, find the probability that exactly 15 of them use their smartphones in meetings or classes.