Ask: “What type of ticket do you require, single or return?”
IF the customer wants ‘return’
Ask: “Wha t rate, Standard or Cheap- day?”
IF the customer replies ‘Cheap -day’
Say: “That will be £11:20”
ELSE
Say: “That will be £19:50”
ENDIF ELSE
Say: “That will be £9:75”
ENDIF 

Now decide the minimum number of tests that are needed to ensure that all
the questions have been asked, all combinations have occurred and all
replies given. 

a) 3
b) 4
c) 5d) 6  

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