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October 12th, 2018, 03:34 AM   #1
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How to solve this beads problem?

In how many ways can 21 Different beads of the same color be stung on a necklace?

Answer is 20!/2
Ganesh Ujwal is offline  
 
October 12th, 2018, 04:11 PM   #2
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Formula: (n-1)! / 2

Go learn:
https://www.quora.com/What-are-the-n...orm-a-necklace
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