Question

Se n(A)=17, n(B)=13, n(A∩B)=7, o n(A∪B) é igual a

n(A∪B)=23
n(A∪B)=21
n(A∪B)=25
n(A∪B)=35​

Answer 1

Resposta:

Se n(a) =17 n(b) = 13 n ( a n b ) =7

n(AUB)=n(a) +n(b)-n( anb )

n(AUB)= 17 + 13 - 7

Se n(a) =18 n(b) = 23 n ( a n b ) =7

n(AUB)=n(a) +n(b)23- n( anb )

n(AUB)= 18 + 23 - 7

n(AUB)= 33