Data Sufficiency: Data Interpretation Sufficiency

Concept Explanation

DI sufficiency questions test whether table, chart, or graph data—combined with statements—yield a unique answer.

Standard Answer Choices

• A — Statement I alone is sufficient; Statement II alone is not.
• B — Statement II alone is sufficient; Statement I alone is not.
• C — Both together are sufficient, neither alone.
• D — Either statement alone is sufficient.
• E — Neither alone nor together is sufficient.

DI DS Focus

Read units and labels first. Statements may give missing row/column values or totals needed to complete the dataset.

DS Decision Flow

1. State exactly what must be determined (number, ratio, yes/no, or comparison).
2. Test Statement I alone—sufficient or insufficient?
3. Test Statement II alone—sufficient or insufficient?
4. If neither alone works, combine both statements.
5. Choose A–E based on sufficiency; never pick a value when data do not fix it uniquely.

Common Traps in DI Problems

• Ignoring units (Rs. lakh vs Rs. crore).
• Using partial table data as if complete.
• Confusing percentage share with absolute value.