Question

4. Si n(A ∩ B) = 6, n(B) = 20 y n(A U B) = 30, entonces n(A) = 16.

Answer 1

Respuesta:

n (A) = 10

Explicación paso a paso:

n( A ∧ B)= 6

n (B) = 20

n(B) = 20-6 = 14

n(A ∨ B) = 30 - 6 - 14 = 10

n (A) = 10