Explanation:

- Unemployment is calculated only from the age group 15 years to 59 years: This statement is partly correct as unemployment statistics generally focus on working-age individuals, but it often includes those above 59 if they are willing to work.

- Unemployment survives only when an individual cannot find a job: This statement is correct. Unemployment is defined by the inability of willing job seekers to find employment.

- People are not interested in working outside the domestic area: This could be a factor influencing local unemployment rates but is not a statistical criterion for measuring unemployment.

Option 3: Only 2 aligns with the provided context of one statement being a necessary condition for unemployment.