ABSTRACT
Imagine you are a contestant on the popular TV game show ‘Who wants to be a millionaire?’ You have answered a few questions and have some money ‘in the bank’ but now you are facing a tricky question. You still have all three ‘lifelines’ in hand so to get help with the answer you can phone a friend, ask the studio audience or use the 50:50 to eliminate two of the four multiple-choice answers. Which lifeline should you opt for?
