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curriculum/challenges/italian/10-coding-interview-prep/project-euler/problem-389-platonic-dice.md

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+---
+id: 5900f4f21000cf542c510004
+title: 'Problem 389: Platonic Dice'
+challengeType: 5
+forumTopicId: 302053
+dashedName: problem-389-platonic-dice
+---
+
+# --description--
+
+An unbiased single 4-sided die is thrown and its value, T, is noted.T unbiased 6-sided dice are thrown and their scores are added together. The sum, C, is noted.C unbiased 8-sided dice are thrown and their scores are added together. The sum, O, is noted.O unbiased 12-sided dice are thrown and their scores are added together. The sum, D, is noted.D unbiased 20-sided dice are thrown and their scores are added together. The sum, I, is noted.
+
+Find the variance of I, and give your answer rounded to 4 decimal places.
+
+# --hints--
+
+`euler389()` should return 2406376.3623.
+
+```js
+assert.strictEqual(euler389(), 2406376.3623);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+function euler389() {
+
+  return true;
+}
+
+euler389();
+```
+
+# --solutions--
+
+```js
+// solution required
+```