GMAT: Data sufficiency 7  Data sufficiency  GMAT  Khan Academy  Summary and Q&A
TL;DR
Content includes math problem solutions involving distance, percentages, and profit calculations.
Questions & Answers
Q: How far did Jane travel in Problem 33?
Jane's travel distance cannot be determined as only her average rate is provided, but not the duration of her travel.
Q: Do both statements in Problem 34 individually provide enough information to determine 15% of x?
Yes, statement 1 and statement 2 individually provide enough information to calculate 15% of x.
Q: What information about rectangle can be inferred from the given statements in Problem 35?
The statements provide limited information about the possible value of "rectangle", making it impossible to determine its exact value.
Q: In Problem 36, does statement 2 alone prove that profit exceeds 4 million on sales of 380,000 units?
Yes, statement 2 confirms that the profit exceeds 4 million on sales of 380,000 units, as it already exceeds 5 million on sales of 350,000 units.
Summary & Key Takeaways

Problem 33: Jane's travel distance cannot be determined based on the given information.

Problem 34: Both statements individually provide sufficient information to calculate 15% of x.

Problem 35: With the given statements, the value of "rectangle" cannot be determined.

Problem 36: Statement 2 alone is enough to confirm that profit exceeds 4 million on sales of 380,000 units.