Sagot :
AnB alt kimesi 32 ise AnB eleman sayısı 5tir.
a-b 10 ve AnB 5 ise s(S)=15
4.15=3.s(B)
60=3.s(B) ise
20=s(B)
20+10=30
gerisini yapamadım :(
30 un 2 li kombınasyonunu yapıcan ozamanda 30*31/2 olur yani 15*31
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