A charity club has 8 members. Three different roles, chair, vice-chair and treasurer, are each given to a different member.
(a)Work out the number of different ways the three roles can be given out.(2)
(b)The treasurer role must go to either Kwame or Sophie. Work out the number of different ways the three roles can now be given out.(3)
(Total for Question 17 is 5 marks)