Question

If n(A) = 16, n(B) = 13 and n(A U B ) = 20, find n (A ∩ B)

With Step-By-Step solution PLEASE

Answer 1

Answer:

$n(A \cap B)=9$

Step-by-step explanation:

n(A) = 16, n(B) = 13 and n(A U B ) = 20

we know that

$n( A\cap B) =n(A) +n(B)-n(A\cup B)\\\\putting \ all \ the \ given \ values\ we \ get\\\\n( A \cap B) =16+13-20\\\\=29-20\\\\=9$