There are 2 brothers among a group of 20 persons. In how many ways can the group be arranged around a circle so that there is exactly one person between the two brothers?

There are 2 brothers among a group of 20 persons. In how many ways can

1.	There are 2 brothers among a group of 20 persons. In how many ways can the group be arranged around a circle so that there is exactly one person between the two brothers?
A.	2 * 17!
B.	18! * 18
C.	19! * 18
D.	2 * 18!
E.	2 * 17! * 17!
Answer» E. 2 * 17! * 17!

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There are 2 brothers among a group of 20 persons. In how many ways can the group be arranged around a circle so that there is exactly one person between the two brothers?

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