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In: Statistics and Probability

A careless university student leaves her iClicker device behind with probability 1/4 each time she attends...

A careless university student leaves her iClicker device behind with probability 1/4 each time she attends a class. She sets out with her iClicker device to attend 5 different classes (each class is in a different lecture theatre).

Part 1) If she arrives home without her iClicker device and she is sure she has the iClicker device after leaving the first class, what is the probability (to 3 SIGNIFICANT figures) that she left it in the 5th class?

Probability =



Part 2) She arrives home without the iClicker device and rushes back to the university to retrieve the device. She has enough time to get to only one lecture theatre before the theatres are locked up for the day. Which class should she try so that she has the best chance of retrieving her device?

First class
Second class
Third class
Fourth class
Fifth class



Part 3) If she arrives home without her iClicker device (after attending 5 classes), what is the probability (to 3 SIGNIFICANT figures) that she left it in the 5th class?

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orchestra answered 2 years ago
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