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A = { 0,1,2,3 }
B = { 1,2,3,4,5 }
Ditanya A - B
A - B = { 0 }
7.
n(s) = 32
n(t) = 15
n(b) = 17
n( t Irisan b ) complement = 3
n( t Irisan b ) = ....
S + I = L
Semesta + Irisan = Lainnya
Irisan = - Semesta + Lainnya
Irisan = - 32 + 15 + 17 + 3 = 3 siswa