Question

if two particular persons never sit together then how many ways 7 persons can be seated in a row​

Answer 1

Answer:

3600

Step-by-step explanation:

no. of ways when those 2 are sitting together = 6! * 2

[ hope u know this method ]

and, total number of ways of arranging 7 persons = 7!

so , no. of ways when those two are not sitting together = 7! - (6!*2)

= 3600

hope it helps uh.....