Question

se puder resolver Fico grato obrigado​

Answer 1

$12 = 30 + 27 - n(aub) \\ 12 = 57 - n(aub) \\ n(aub) = 57 - 12 \\ n(aub) = 45$

vc pegará n(AUB) = n(A) + n (B) - n(AUB)

o resultado será n(AUB)= 45

Answer 2

Resposta:

12=30+27−n(aub)12=57−n(aub)n(aub)=57−12n(aub)=45

espero ter ajudado