Let U={1,2,3,…,30}U = \{1, 2, 3, \dots, 30\}U={1,2,3,…,30} be the universal set. Let A={x∈U:x≡1(mod3)}A = \{x \in U : x \equiv 1 \pmod 3\}A={x∈U:x≡1(mod3)} and B={x∈U:x≡2(mod5)}B = \{x \in U : x \equiv 2 \pmod 5\}B={x∈U:x≡2(mod5)}. Find the cardinality of the set A∩B′A \cap B'A∩B′.
8
10
2
6