Cora makes a scarf with cloth rectangles and triangles. for every 5 pieces of cloth, 2 are rectangles. she needs 15 pieces of cloth to complete her scare

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected