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cate combinatii sunt posibile in 20 de numere luate cate 10 ?

Răspuns :

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Vezi imaginea VASSY
Formula este 
Combinari de n luate cate k= n! / k!(n-k)! .
In cazul acesta avem
C de 20 luate cate 10= 20! / 10!(20-10)! = 184756