yang no 2 yang a,b,dan c

A={6,7,8,9,10}
B={4,5,6,7}
C={6,7,8,9}
a. (A potongan B) Gabungan (B potongan C)
= {6,7} Gabungan {6,7}
= {6,7}
b. {6,7,8,9,10} potongan {4,5,6,7,8,9,10}
= {6,7,8,9,10}
c.{4,5,6,7,8,9} potongan {6,7,8,9,10}
= {6,7,8,9}