Question

if n(A) = 17 , n(B) = 14 , n(A n B) = 6, what is n(A u B)​

Answer 1

Answer:

We know that

n(AuB)=n(A)+n(B)-n(AnB)

n(AuB)=17+14-6

n(AuB)=31-6

n(AuB)=25