If n letters are randomly placed in correctly addressed envelopes, prove that the probability that exactly r letters are placed in correct envelopes is given by : n -r r! 2 (-1)*; r= 1, 2, ..., n k = 0
If n letters are randomly placed in correctly addressed envelopes, prove that the probability that exactly r letters are placed in correct envelopes is given by : n -r r! 2 (-1)*; r= 1, 2, ..., n k = 0
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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![If n letters are randomly placed in correctly addressed envelopes, prove that the
probability that exactly r letters are placed in correct envelopes is given by :
n - r
1
1
i 2 (-1)*; r= 1, 2, ..., n
•••1
r !
k = 0
k !](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fba43af80-5363-4c74-92af-bd5bc2dafe13%2Fc4379955-157b-4d9e-bd4f-009a7f97e313%2F3yz8yra_processed.jpeg&w=3840&q=75)
Transcribed Image Text:If n letters are randomly placed in correctly addressed envelopes, prove that the
probability that exactly r letters are placed in correct envelopes is given by :
n - r
1
1
i 2 (-1)*; r= 1, 2, ..., n
•••1
r !
k = 0
k !
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