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  3. a) 10 children are to be divided into an a team an

a) 10 children are to be divided into an A team and a B team...

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Statistics

a) 10 children are to be divided into an A team and a B team of5 each. The A team will play in one league and the B team inanother. How many different divisions are possible? Answer:(10!/5!5!)

b) 10 children at a playground divide themselves into two teamsof 5 each. How many different divisions are possible?Answer: (10!/5!5!2!)

I don't understand why in b we divide by 2!, can someoneexplain it in detail? It would be better to visualize. Thankyou!

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