Question

Using venn diagram , verify n(AUB)=n(A)+n(A)-n(AnB)​

Answer 1

Step-by-step explanation:

from vendiagram

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

And, n(b-a) =n(b)-n(anb)

Again from vendiagram we get 1 formula

n(aub)=n(a-b)+n(b-a)+n(a-b)

n(aub)=n(a)+n(b)-n(anb) [putting the value of n(a-b), n(b-a) ]

Hence proved.