Probability calculator

Open Probability calculator on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "probability-calculator",
  "category": "calculators",
  "built": true,
  "requirements": "Enter probabilities from 0 to 100%. The supplied intersection must satisfy the Fréchet bounds. Independence is used only when explicitly selected. Conditional probabilities with a zero denominator are undefined, not zero.",
  "implementation": {
    "fields": [
      {
        "key": "a",
        "label": "Probability of A (%)",
        "value": 30,
        "type": "number",
        "min": 0,
        "max": 100,
        "step": "any"
      },
      {
        "key": "b",
        "label": "Probability of B (%)",
        "value": 40,
        "type": "number",
        "min": 0,
        "max": 100,
        "step": "any"
      },
      {
        "key": "method",
        "label": "Relationship between events",
        "value": "Assume independence",
        "type": "select",
        "values": [
          "Assume independence",
          "Supply intersection"
        ]
      },
      {
        "key": "intersection",
        "label": "Probability of both A and B (%)",
        "value": 12,
        "type": "number",
        "min": 0,
        "max": 100,
        "step": "any",
        "showWhen": {
          "method": [
            "Supply intersection"
          ]
        }
      }
    ],
    "note": "Calculate complements, unions, intersections and conditional probabilities. Independence is an explicit assumption. A conditional probability is undefined if its conditioning event has probability zero.",
    "input": false,
    "live": true,
    "presentation": "metrics",
    "background": false,
    "inputMaxLength": 1000000,
    "inputErrorCode": "STAT_SIZE",
    "experience": {
      "automatic": true,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Your text",
      "placeholder": "Type or paste your input…",
      "help": "Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.",
      "helpParts": [
        "Change the input or settings to update your result.",
        "Results update as you type.",
        "Up to 1,000,000 characters."
      ],
      "action": null
    },
    "mode": "automatic",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

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