There are 7 groups in a picnic who has brought their own lunch box, an – McqOptions

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1.	There are 7 groups in a picnic who has brought their own lunch box, and then the 7 lunch box are exchanged within those groups. Determine the number of ways that they can exchange the lunch box such that none of them can get their own.
A.	655
B.	328
C.	1854
D.	3765
Answer» D. 3765

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