Question

Se n(A)=18, n(B)=23, n(A aquele U de cabeça para baixo B)=7, determine n(AUB)

Answer 1

coloca

n(AUB) = n(A) + n(B) - n(A ΠB)

n(AUB) = 18 + 23 - 7

n(AUB) = 34


att: Jhonny.