You Have Been Asked to Select at Least 3 Out

question 26

Short Answer

You have been asked to select at least 3 out of 7 possible sites for oil exploration. Designate each site as S1, S2, S3, S4, S5, S6, and S7. The restrictions are:
Restriction 1. Evaluating sites S1 and S3 will prevent you from exploring site S7.
Restriction 2. Evaluating sites S2 or S4 will prevent you from assessing site S5.
Restriction 3. Of all the sites, at least 3 should be assessed.
Assuming that Si is a binary variable, write the constraint(s) for the second restriction.

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Definitions:

Disease

A disorder or malfunction of the mind or body that results in discomfort, dysfunction, distress, or death to the person afflicted.

Stress

A physical, mental, or emotional factor that causes bodily or mental tension and may be a factor in disease causation.

Control

in experimental research, refers to the practice of limiting factors that could distort or influence the experiment's outcomes outside of the independent variable.

Situation

A set of circumstances or the environment in which an event occurs.