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b. lingkaran A dan B digabung = 1,2,3 luar lingkaran = 4,5,6,7,8,9,10.11.12
c. lingkaran A= 1,2 lingkaran B= 5,6,7 perpotongan= 3,4 luar lingkaran 8,10
d. lingkaran A= 1,3,5,7 lingkaran B= 2,4,6 diluar lingkaran= 8,9,10