Bunuel wrote:

If the set {10, 5, 9, x} has a median of 7, which of the following could not be a possible value of x?

A. 1

B. 3

C. 4

D. 5

E. 7

Testing the option starting from option A

A= [1, 5, 9, 10] Median = 7 Not correct option

B= [3, 5, 9, 10] Median = 7 Not correct option

C= [4, 5, 9, 10] Median = 7 Not correct option

D= [5, 5, 9, 10] Median = 7 Not correct option

E= [5, 7, 9, 10] Median = 8 correct option. Therefore

answer is option E
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