Question

Diketahui A = { x | x € ganjil antara 11 dan 20 } B = { x | x ≤ 20, x € A } K = { 2,3}
Tentukan : n(A) + n(B) - n(K)

Answer 1

A = {13,15,17,19}
n(A) = 4

B = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}
n(B) = 20

K = {2,3}
n(K) = 2

n(A) + n(B) - n(K)
= 4 + 20 - 2
= 22