Is n(A-B) = n(A) - n(B) ? (chapter 2 relations and functions class 11)
Added by Stacy R.
Step 1
n(A) means the total number of elements in set A. n(B) means the total number of elements in set B. So, n(A-B) = n(A) - n(A ∩ B) This is because the elements in A that are also in B are counted twice in n(A) and n(B), so we need to subtract them once to Show more…
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