Data Sufficiency

Judging whether given statements contain enough information to answer a question, without solving for the final value.

📖 ~4 min read 🧠 RRB NTPC / Group D — Reasoning

Standard Answer Choices

Option	Meaning
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, but neither alone is
D	Either statement alone is sufficient
E	Both together are still not sufficient

💡 Example: What is Ravi's age? I. Ravi is 5 years older than Sita. II. Sita is 22. → Neither alone is sufficient; together, Ravi = 27. Answer: Option C.

⚠️ Always test each statement in isolation first — combining them too early is the most common reason for wrong answers here.

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