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Nine family members: 5 grandchildren (3 brothers and 2 sisters) and their 4 grandparents are to be seated around a circu

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Nine family members: 5 grandchildren (3 brothers and 2 sisters) and their 4 grandparents are to be seated around a circu

by VJesus12 » Sun Aug 15, 2021 9:04 am

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Nine family members: 5 grandchildren (3 brothers and 2 sisters) and their 4 grandparents are to be seated around a circular table. How many different seating arrangements are possible so that 2 sisters are seated immediately between some pair of brothers.?

A. 120
B. 480
C. 1440
D. 2880
E. 8640

Answer: C

Source: GMAT Club Tests
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