How many ways can 8 people stand in a line if Tison and Ray refuse to stand next to each other? Solution will be in the form of 'n' write solution as n^2.
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Total number of arrangements = 8 !
Number of arrangements in which Tison and Ray stand next to each other = 2 ( 7 ! )
Hence total number of arrangements in which Tison and Ray dont stand next to each other are = 8 ! − 2 ( 7 ! ) = n