On Quant Interviews [top] - 150 Most Frequently Asked Questions

"Linearity of expectation. First die average 3.5, second die average 3.5. So 3.5 – 3.5 = 0."

(Questions 63–80 cover SVD decomposition, partial derivatives, and convergence of series.) 4. Statistics and Machine Learning 150 Most Frequently Asked Questions On Quant Interviews

Alex visualizes: Fill the 5, pour into 3 → leaves 2 in the 5. Empty the 3, pour the 2 from 5 into 3. Fill the 5 again, pour 1 gallon into the 3 (which already has 2) → leaves 4 in the 5. "Linearity of expectation