Answer:5
Step-by-step explanation:
This can be solved by fixing the position of shortest and tallest person in the first and second row respectively .
Rest we have four person remaining and we have to arrange 4 person in 4 positions therefore we can do it in
[tex]^4P_2[/tex]ways out of which we have to exclude the case when both the tall persons is in the first row and short person in second rows
Therefore a total of 6-1 ways is possible