{
  "week": 8,
  "title": "Probability and Bayes Thinking",
  "questions": [
    {
      "q": "P(A|B) means?",
      "options": [
        "A and B",
        "A given B",
        "A or B",
        "Not A"
      ],
      "answer": 1,
      "explanation": "P(A|B) is conditional probability."
    },
    {
      "q": "The probability of a fair coin landing heads is?",
      "options": [
        "0.25",
        "0.5",
        "1",
        "2"
      ],
      "answer": 1,
      "explanation": "Fair coin heads probability is 0.5."
    },
    {
      "q": "Bayes theorem is useful for?",
      "options": [
        "Updating belief with evidence",
        "Changing screen color",
        "Building HTML only",
        "Compressing files"
      ],
      "answer": 0,
      "explanation": "Bayes updates belief after observing evidence."
    }
  ]
}