If n letters are randomly placed in correctly addressed envelopes, prove that theprobability that exactly r letters are placed in correct envelopes is given by :n - r11i 2 (-1)*; r= 1, 2, ..., n•••1r !k = 0k !

Answered: Image /qna-images/answer/c4379955-157b-4d9e-bd4f-009a7f97e313.jpg

Answered: If n letters are randomly placed in…

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 r! 2 (-1)*; r= 1, 2, ..., n k = 0