Which of the following statements is TRUE A If X M and X N t

Which of the following statements is TRUE:

A.) If X M and X N then x is a member of (M N)

B.) If X M or X N) then x is a member of (M N)

C.) If X M and X N) then X is a member of (M N)

D.) None of the above statements are true

Solution

a) true because (M intersection N) is subset of (M union N)

b) False, not always the case.

c) true, this is definition of intersection.