An airline company uses a random selection method to select who boards first, second, etc. for its small planes. If there are 20 people who need to be boarded, how many different ways can the first three be selected?

Diana baniak Searching for an ecology class, knows that it must be in one of eight classrooms. Since the professor does not allow people to enter after the class has begun, and there is very little time left, she decides to try just three of the rooms at random. how many of the possible different selections of three rioms will succeed in locating the class

An opinion poll contacts 1021 adults and asks them, which political party do you think has better ideas for leading the country in the twenty first century? In all, 723 of the 1021 day, the democrats. The sample in the setting is? (a) all 220 million adults in the U.S.  (b) the 1022 people interviewed  (c) the 723 people who chose the democrats.

Bowl A contains 2 red chips; bowl B contains two white chips; and bowl C contains 1 red chip and 1 white chip. A bowl is selected at random, and one chip is taken at random from that bowl.