Answer: C
\(n = 10\) ∴ Median = \(\cfrac{1}{2}\) (5th term + 6th term) \(= \cfrac{1}{2}(x + 2 + x + 3) = \cfrac{2x + 5}{2}\) \(\therefore\) According to the condition, \(\cfrac{2x + 5}{2} = 21\) Or, \(2x + 5 = 42\) Or, \(2x = 37\) Or, \(x = 18.5\)
\(n = 10\) ∴ Median = \(\cfrac{1}{2}\) (5th term + 6th term) \(= \cfrac{1}{2}(x + 2 + x + 3) = \cfrac{2x + 5}{2}\) \(\therefore\) According to the condition, \(\cfrac{2x + 5}{2} = 21\) Or, \(2x + 5 = 42\) Or, \(2x = 37\) Or, \(x = 18.5\)