Question

Write the sets A, B, AUB, ANB, A-B and B-A
Verify whether n(AUB)= n(A)+n(B)-n(ANB).​

Answer 1

Answer:

Also, If we subtract the Elements of set A from the Elements of Set B which are common to both the sets, then

n(A−B)=n(A)−n(A∩B) n(A−B)=n(A)−n(A∩B)

Thus,

n(A∪B)=n(B)+n(A−B) n(A∪B)=n(B)+n(A−B) ,

Therefore,

n(B)+n(A−B) n(A∪B)=n(B)+n(A−B)

so as we know that….

n(A) = 5 , n(B) = 7

so answer will be 5

Step-by-step explanation:

hope it will help you