In a TV game show here in Blighty, Deal or No Deal a contestant [1 of 22] had managed to open 20 boxes with sums of money ranging from 1 penny to £250,000, and was left with 2 boxes one with £250,000 the other with £75,000. An unseen banker offered he £125,000 to end the game. The minimum she would walk off with was £75,000, but the lure of £250,000 led her to NO DEAL. At that the banker offered her the choice of exchanging her box for the other un-opened box. What is the smart thing to do? And why?
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