Question

Sendo n(A U B) = 20, n(A) = 14 e n(B) = 10, determine n(A ∩ B ).

Answer 1

Resposta:

n(A∩B)=4

Explicação passo a passo:

n(AUB)=n(A) +n(B) -n(A∩B)

20=14+10-x

20=24-x

x=24-20

x=4