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I heard on Facebook that two people won the same big lottery with the same winning number. Is this that lottery? Does anyone know if this is true? – Stefan Smith Dec 19 '13 at 2:37
up vote 2 down vote accepted

You choose 5 numbers from within the set {$1,2,...,75$}, in $75C5=17259390$ ("75 choose 5") ways. Then you multiply by 15 , because you can choose the additional ball in 15 ways. Then you have $17259390)(15)=258890850$

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