Hosted by The Math Forum## Problem of the Week 1011## Musical Airplane Seats
Alice is at the front of a line of 100 people ready to board a 100-seat airplane. Bob is at the back of the line. Alice has lost her boarding pass, so she simply takes a random seat. Everyone else takes their proper seat if it is available, or takes a random empty seat if not. What is the probability that Bob gets to sit in his properly assigned seat?
Source: © Copyright 2004 Stan Wagon. Reproduced with permission. |

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8 September 2004