Question

U={1,2,3,........10} A={1,2,3,4,5}A∆B={1,2,3,4}then n(B-A) is​

Answer 1

Step-by-step explanation:

A∆B which is called the symmetric difference between A and B is defined as (A-B)U(B-A).

Now, A-B is the set of all elements which are in A but not in B. So, A - B = {1,2}.

Similarly, B-A is the set of all elements which are in B but not in A. So, B - A = {5}.

Hence A ∆ B = (A-B)U(B-A) = {1,2,5}

Answer 2

Answer:

Step-by-step explanation:

A-B {1,2}