You Have Been Asked to Select at Least 3 Out

question 63

Multiple Choice

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, the constraint for the first restriction is :

• A) S1 + S3 + S7 ≥ 1
• B) S1 + S3 + S7 ≤1
• C) S1 + S3 + S7 = 2
• D) S1 + S3 + S7 ≤ 2

---

Definitions:

Transgenic Organisms

Organisms that have been genetically modified to contain DNA from an external species.

Gene Expression

The process by which information from a gene is used to synthesize a functional gene product, often a protein.

Genetic Diseases

Disorders caused by abnormalities in an individual’s DNA, often leading to dysfunctions in health and development.

Gene Therapy

Any of a variety of methods designed to correct a disease or alleviate its symptoms through the introduction of normal, therapeutic genes into the affected person’s cells.