Question

if A={b,d,e,g,h},and B={a,e,c,h},verify that n(A-B)=n(A)-n(A intersection B)​

Answer 1

Step-by-step explanation:

A={b,d,e,g,h},and

B={a,e,c,h},

n(A) = 5

n(B) = 4

A-B= {B, d, g}

n(A-B) = 3

AnB= {e, h}

n(AnB) = 2

LHS= n(A-B) = 3

RHS = n(A)-n(A intersection B)

= 5-2

=3

LHS=RHS

Hence verified