Question

Se n(A) = 18, n(B) =23, n(A intersecção B) =7, determine n(AUB)

Answer 1

Olá,

n(AUB) = n(A) + n(B) - n(A∩B) 
n(AUB) = 18 + 23 - 7
n(AUB) = 34

Bons estudos.