{"blocks": [{"key": "13761fe0", "text": "Scenario", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "93937cb0", "text": "Product manager asks a quick probability check during a design review to gauge statistical intuition.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "5c9612d2", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "1e2580b8", "text": "You flip a fair coin repeatedly until the sequence Heads–Tails (HT) appears consecutively. What is the expected number of flips required?", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "b86c56a6", "text": "Hints", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "8e5a8758", "text": "Model as states: start, last flip H, and absorbing HT; use expected value equations.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}