Question

if A={1 ,2,4,7,9}and B ={ 2,3,7,8,9} then find n (p(A∆B )

Answer 1

Answer:

4

Step-by-step explanation:

A-B={1 ,2,4,7,9}-{ 2,3,7,8,9}={1,4}

B-A={ 2,3,7,8,9}-{1 ,2,4,7,9}={3,8}

A∆B=A-B U B-A

={1,4}U{3,8}={1,3,4,8}

n(A∆B)=4