A community centre has five swiimming classes with 25 students in each class.

A community centre has five swimming classes with 25 students in each class. The community centre is conducting a study to assess the students’ level of satisfaction with the class. The letters A, B, C, D, and E are used to label the classes. Each student in a class is numbered from 1 to 25. For example, C11 indicates the 11th student in class C. Identify the sampling method used to select the following students and justify your answer.

a) A03, A10, B03, B12, C11, C22, D01, D17, E02, E25

b) D01, D02, D03, D04, D05, D06, D07, D08, D09, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24, D25.

c) A01, A12, B11, C11, D21, E01, E03, E15


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