<prompt> In a study every fouh student is selected in a class while sampling. This is a type of:-Simple random samplingSystematic random samplingStratified random samplingCluster random sampling  <response>: Systematic Random Sampling:- Based on sampling fraction: Every Kth unit is chosen in the population list, where K is chosen by sampling internal. Sampling interval K : Total no. of units in population Total No of units in sample. 