Respuesta :

Answer:

n (x intersect y) = 2.

Step-by-step explanation:

I think you mean n ( x intersect y).

n(x) + n(y) = 17 + 23 = 40.

But n(x U y) = 38  so 40 - 38 = 2  elements are common to set x and set y.

Therefore n (x ∩ y) = 2.