posted by sunil .
give a brief note of the measures of central tendency together with their merits and demerits. which is the best measure of central tendency and why?
I searched Google under the key words "mean mode median comparison" to get these possible sources:
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.