A vending machine sells a hot drink: first you choose Tea or Coffee, then you choose Whole milk, Semi-skimmed milk or None. Part of the tree diagram is shown: the Tea branch splits into three further branches (Whole, Semi-skimmed, None), but the branches after Coffee are missing.
Figure (to be drawn): A two-stage tree diagram. Stage 1 has two branches from a single starting point, labelled 'Tea' and 'Coffee'. From the end of the 'Tea' branch, three further branches are drawn and labelled 'Whole', 'Semi-skimmed' and 'None'. From the end of the 'Coffee' branch, no further branches are drawn; this is the part the student must complete.
(a)Copy and complete the tree diagram by adding the three missing branches after Coffee, labelled correctly.(1)
(b)Use the completed tree diagram to work out the total number of different drink orders possible.(1)
(Total for Question 12 is 2 marks)