People who are available, volunteer, or easily recruited are used in:

People who are available, volunteer, or easily recruited are used in: (a) Simple random sampling

(b) Cluster sampling

(c) Systematic sampling

(d) Convenience sampling

✅ Correct option: (d) Convenience sampling

Explanation:

Convenience sampling involves selecting participants who are readily available or willing to volunteer. It is commonly used when time, resources, or access are limited. Although convenient and cost-effective, this method has limitations in generalizability because the sample may not represent the population accurately. However, it is widely used in preliminary research and classroom studies. Thus, option (d) is correct.

10 Related PPSC Facts:

Convenience sampling is nonrandom Easy and quick Low cost Limited generalizability Common in student research Volunteer bias possible Used in pilot studies Participants are easily accessible Not statistically representative Useful for exploratory research