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Tryingmybest
- Master | Next Rank: 500 Posts
- Posts: 168
- Joined: Thu Nov 13, 2008 4:34 am
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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
OA D
6
11
17
72
210
OA D
