Math miscellaneousHard
Question
If the mean deviation about the median of the numbers a, 2a, ....., 50a is 50, then |a| equals
Options
A.3
B.4
C.5
D.2
Solution
A = Median =
= 25.5aMean deviation
{| a - 25.5a| + | 2a - 25.5a|} = 
{(24.5a 23.5a) ......(0.5a)} {312.5a} = 50 (Given)⇒ 625a = 2500 ; ⇒ a = 4
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