Question
In how many ways can 17 members be seated in two lines
with seating capacity of 9 and 8 members respectively? 1.    9! ×8! 2.    17 C9 ×17C8 3.    17 C9 4.    17 C8 ×5!Solution
Total member = 17 Type of arrangement 9 member in 1 row first in 17 members =17C9 Sitting arrangement of eight members in the second row out of 17 members         =17C8 Total types = 17 C9 ×17C8
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