Jawabanmu

2014-09-04T16:17:07+07:00
A = { kelipatan dari 2 dan 3 < 30}
Kelipatan 2 < 30 = 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24,26, 28 (total =14)
Kelipatan 3 < 30 = 3, 6, 9, 12, 15, 18, 21, 24, 27 (total = 9)
Jadi n(A) = 14 + 9 = 23