R is a set containing 8 different numbers. S is a set containing 7 different numbers, all of which are members of R. Which of the following statements CANNOT be true?
(A) The range of R is less than the range of S.
(B) The mean of R is greater than the mean of S.
(C) The range of R is equal to the range of S.
(D) The mean of R is less than the mean of S.
(E) The mean of R is equal to the mean of S.
I got he right answer (
) but had to some guess work on choice D. Any idea how can we prove that choice
can be true as well?
MGMAT 1 --> 530
MGMAT 2--> 640
MGMAT 3 ---> 610