Question

verify the following​

Answer 1

Answer:

n (A-B) = 1

Step-by-step explanation:

A ={1,2,3}

B ={2,3,4}

A-B={1}

n(A-B)=1

AUB={1,2,3,4}

n(AUB) = 4

n (A-B) = 4-3

= 1

So,

n (A-B) = n (AUB) - n (B)

Answer 2

Answer:

answer attached with pic