{"blocks": [{"key": "1e58b26c", "text": "Scenario: An experiment drops Y ad impressions randomly across X users. Compute per‑user expectation and the probability an individual sees at least one impression.", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "d23abde1", "text": "", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "4a566202", "text": "Question 1: With Y impressions randomly assigned to X users, compute expected impressions per user and probability of at least one. (Hint: Poisson approximation, independence)", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}