If the median of observations 12, 1, 8, 54, 61, 28, 45, 35, 21, 17 is M, then what is the value of 2M + 5 ?

After arranging in ascending order,

  1,8,12,17,21,28,35,45,54,61

$$  Median = \frac{21+28}{2}= \frac{49}{2}$$

So, 2M+5 = 54

Answer (D) – 54