There are 2 twin sisters among a group of 15 persons. In how many ways can the group be arranged around a circle so that

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answerhappygod
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There are 2 twin sisters among a group of 15 persons. In how many ways can the group be arranged around a circle so that

Post by answerhappygod »

a) 15 *12! * 2!
b) 15! * 2!
c) 14C2
d) 16 * 15!
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