If the mean deviation about the median of the numbers $\mathrm{a},2\mathrm{a},\ldots,50\mathrm{a}$ is 50, then $|\mathrm{a}|$ equals (1) 3 (2) 4 (3) 5 (4) 2
If the mean deviation about the median of the numbers $\mathrm{a},2\mathrm{a},\ldots,50\mathrm{a}$ is 50, then $|\mathrm{a}|$ equals\\
(1) 3\\
(2) 4\\
(3) 5\\
(4) 2