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?

Answer 1

I searched Google under the key words "mean mode median comparison" to get these possible sources:

http://www.google.com/search?client=safari&rls=en&q=mean+mode+median+comparison&ie=UTF-8&oe=UTF-8

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/.