Random sampling is a research technique in which a sample is chosen from a larger population in such a way that every individual or item in the population has an equal chance of being selected.1. Simple Random SamplingA simple random sample is one in which each and every member of the population has an equal and independent chance of being selected.2. Stratified Random SamplingStratified random sampling is a process in which certain subgroups, or strata, are selected for the sample in the same proportion as they exist in the population.