For the positive numbers 30, 60, 90, and x, which of the following could be the median of these 4 numbers? I. 42 II. 48 III. 75 (A) II only (B) III only (C) I and II only (D) II and III only (E) I, II, and III 解等はDです。 何方か教えてください。 宜しくお願いします。
