Set A= (4/7), 1, (5/2), 4, (11/2), 7
Set B= (4/7), (7/4), 4, 7
If n is a member of both Set A and Set B above which of the following must be true?
I. n is an integer
II. 4n is an integer
III. n=4A)None
B) II only
C) I and II only
D) I and III only
E) I, II, and III
There are 3 numbers that are members of both sets: , 4, and 7. The question asks which of those conditions must be true. I doesn’t have to be true—
isn’t an integer. II also doesn’t have to be true, because
is still not an integer. III also doesn’t have to be true—neither
nor 7 are equal to 4.