Question

4. Let = = {x :x 6 N, 5 < x < 20}, X = {x : Xe N, 10 < x < 20}, Y = {x : X N, 2x < 30). Find
a. n(XUY) b. n(X n Y)
c. n(X')
d. n(X'OY')
e. n(XU Y)' f. n(X - Y)
Verify that n(XU Y) = n(X) + n( Y) – n(Xn Y).​

Answer 1

Answer:

I don't know what is the Mail the day of the classroom ☺️