MMR can be defined as the combination of quantitative and qualitative methods for a clear understanding of research objectives than either approach alone. It is because MMR balances the weaknesses of quantitative and qualitative research and transforms them into strength. By using all types of data collection tools, researchers can get more comprehensive evidence for a research problem. On the other hand, MMR enables researchers to answer questions that cannot be answered by qualitative or quantitative approaches alone. MMR can be so functional that the researchers feel free to make use of different methodologies to reach the research objectives. It is possible to use words, pictures and narrative to add meaning to numbers in MMR. Requiring more than one research is considered as a weakness of mixed methods research.