Out of seven models, all of different heights, five models will be chosen to pose for a photograph. If the five models are to stand in a line from shortest to tallest, and the fourth-tallest and sixth-tallest models cannot be adjacent, how many different arrangements of five models are possible?
6
11
17
72
210
Pls answer with explanation.
6
11
17
72
210
Pls answer with explanation.
