A total of n male psychologists remembered to attend a meeting about absentmindness. After the meeting, none could recognise his own hat so they took hats at random. Furthermore, each was liable, with probability p and independently of the others, to lose the hat on the way home. Assuming, optimistically, that all arrived home, find the probability that none had his own hat with him, and deduce that it is approximately e-(1-P).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 31E
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A total of n male psychologists remembered to attend a meeting about
absentmindness. After the meeting, none could recognise his own hat so they took hats at
random. Furthermore, each was liable, with probability p and independently of the others,
to lose the hat on the way home. Assuming, optimistically, that all arrived home, find
the probability that none had his own hat with him, and deduce that it is approximately
e-(1-p)
Transcribed Image Text:A total of n male psychologists remembered to attend a meeting about absentmindness. After the meeting, none could recognise his own hat so they took hats at random. Furthermore, each was liable, with probability p and independently of the others, to lose the hat on the way home. Assuming, optimistically, that all arrived home, find the probability that none had his own hat with him, and deduce that it is approximately e-(1-p)
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