Na ile sposobów mozna wybrac 3-osobowy samorzad klasowy w klasie 25-osobowej?
n=25
k=3
Korzystam ze wzoru n!/(k!(n-k)!)
25!/(3!(25-3)!)=
25!/(3!22!)=
(23*24*25)/6=
23*4*25=2300
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n=25
k=3
Korzystam ze wzoru n!/(k!(n-k)!)
25!/(3!(25-3)!)=
25!/(3!22!)=
(23*24*25)/6=
23*4*25=2300