7 Identify the sampling technique used to obtain the following sample.Beach balls in a bin are shaken and then balls are selected from the bin.Choose the correct sampling technique below.O A. Systematic samplingO B. Random samplingOC. Stratified samplingO D. Cluster samplingO E. Convenience sampling

Population is the set of all objects of interest. Sample is s subset of the population. It is not practically possible to study the entire population if the population is very large. In such situations a sample will be drawn from the population and inferences about the population is made. There are many method are there in statistics for sampling.In random sampling, the sample is randomly selected from the population using any random strategy. Here the balls in the bin is shaken and hence mixed. So the selected balls are random and hence it is random sampling. Thus option B, random sampling is the correct option. Systematic sampling require sampling frame. No such sampling frame is used here. So option A is wrong. Stratified sampling need different subgroup or strata. No such strata is here in the population. So option C is wrong. Cluster sampling involve clusters. No such cluster is here in the population. So option D is wrong. Convenience sampling does not involve any randomness. Here the samples are collected at random and hence option E is wrong.