A blind man is to place 5 letters into 5 pigeon holes, how many ways can 4 of the letters be wrongly placed? (note that only one letter must be in a pigeon hole)


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Question Number 111732 by Aina Samuel Temidayo last updated on 04/Sep/20

$A blind man is to place 5 letters into 5$ $pigeon holes, how many ways can 4 of$ $the letters be wrongly placed ?$ $(note that only one letter must be in a$ $pigeon hole)$
	Answered by mr W last updated on 04/Sep/20

	$o n e l e t t e r i s c o r r e c t a r r a n g e d :$ $t h e r e i s 5 w a y s$ $t h e o t h e r 4 l e t t e r s a r e d i s a r r a n g e d :$ $t h e r e a r e! 4 = 9 w a y s$ $\Rightarrow 5 \times 9 = 45 w a y s$
	Commented by Aina Samuel Temidayo last updated on 04/Sep/20

	$Thanks .$
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