Question

if n(A)=100,n(B)=70,n(A intersection B)=20,then n(A triangle B)is​

Answer 1

Answer:

130 is the answer

Step-by-step explanation:

n(A)=100,n(B)=70 and n(A∩B) = 20

n(A∪B) = n(A) + n(B) - n(A∩B)

n(A∪B) = 100 + 70 - 20

           =170 -20

          = 150

n(AΔB) = n(A∪ B) - n(A∩B)

            = 150 - 20

            = 130

Answer 2

answer for this question