GWD-19-32

meckychen

Q32:

A certain list consists of 3 different numbers.  Does the median of the 3 numbers equal the average (arithmetic mean) of the 3 numbers?

(1)   The range of the 3 numbers is equal to twice the difference between the greatest number and the median.

(2)     The sum of the 3 numbers is equal to 3 times one of the numbers.

Answer is D, how to consider? Thank you.

a10285

设三个数 A <B< C
(1)C-A=2(C-B)
3B=A+B+C  成立
(2)A+B+C=3X
因为   3A<A+B+C<3c
所以明显 X=B
成立

选D！

meckychen

Thank you.