Answer to Question #152352 in Discrete Mathematics for Shaik heena

Question

There are 7 groups in a picnic who have brought their own lunch box, and then the 7-lunch boxes 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.

Answer 1

Since there are 7groups then each group has 6ways

Total number of ways =7×6ways=42ways