Question

A={a,b,c} ; B = {x,y,z} then n(A-B)=?
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Answer 1

Answer:

set n(A-B)=n(A)=3

Step-by-step explanation:

Because A and Don't have anything in common

Answer 2

Answer:

n(A-B)=3

Step-by-step explanation:

Given:

A = {a,b,c}

B ={x,y,z}

Therefore A-B={a,b,c}

Hence n(A-B)=3

Note : A-B means the elements of A