Question

if a and b are two set such that n(a)=115,n(b)=326 and n(a-b)=47then write (Aunion B)

Answer 1

n(A U B) = n(A-B) + n(B)

= 47 + 326


= 373

Answer 2

Answer:

The value of n(a∪b)=373

Step-by-step explanation:

Given a and b are two set such that n(a)=115,n(b)=326 and n(a-b)=47

we have to find n(a ∪ b)

As, n(a-b)=n(a)-n(a∩b)=115-47=68

Now, we know, n(a)=115, n(b)=326 and n(a∩b)=68

By using formula,

n(a∪b)=n(a)+n(b)-n(a∩b)

          =115+326-68=373

Hence, the value of n(a∪b)=373