Answer Happy

Probability Question 1 There are 4 blue and 6 green balls in a bag. A ball is selected at random without replacement. A second ball is then selected at random. a) Draw a tree diagram to represent all of the possible outcomes. (3 marks) b) What is the probability of two blue balls being selected? Give your answer to 3 d.p. (2 marks) c) What is the probability that 1 blue and 1 green ball are selected, in any order? Give your answer to 3 d.p. (3 marks) Question 2 A researcher selected randomly 10 candidates for a reality tv show. If 10% of the candidates to this show pass the first round, find the probability (to 3 d.p.) that: a) None of the candidates in this researcher sample will pass the first round. b) The majority of the candidates in this sample will not pass the first round. (4 marks) (8 marks)