Answer:
15 is the sample
Step-by-step explanation:
All items which fall within the purview of enquiry is known as Population. Population is a complete set of all possible observations of the type which is to be investigated.
Sample is used to describe a portion chosen from a population. A finite subset of statistical individuals defined in a population is called a sample.
From the given question, 30 is the population and 15 is the sample.
