Question

4. Let 5 = {x : X € N,5 5 x 5 20), X= {x:x € N, 10 <x< 20}, Y = {x : X € N, 2x < 30). Find
a. n(XU Y)
b. n(
XY)
c. n(X')
e. n(XU Y)
f. n(X - Y)
Verify that n(
XU Y) = n(X) + n( Y) - n(X n Y).​

Answer 1

Answer:

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