This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Median weight of 100 children was 12 kgs. The Standard Deviation was 3.Calculate the percentage coefficient of variance - 
Select and explain. 
A. 25%, B. 35%, C. 45%, D. 555
A: 25%
Answer: A: 25% 
Explanation: We cannot calculate coefficient of variance here, because value of mean has not been provided (value of median is given).
Only in standard normal curve mean = median.
But in that case both are '0' (In standard normal curve mean = median = mode = 0)
I am clueless here.
It you take, value of median as mean than the answer will be 25%.

3/12 x 100 = 25%