1) In a survey, 3 of 4 students said the court show "too much concern" for the criminals. Find the probability that AT MOST 3 out of 7 randomly selected students will agree with this statement.
2) In 2010 almost 15 million U.S. workers belonged to trade unions, constituting 11.9% of the total labor force. Choose 15 U.S. workers at random. What is the probability that exactly one-third of them belong to a trade union? At least one third? What is the probability that at least 9 did not belong?