65 lines
1020 B
Markdown
65 lines
1020 B
Markdown
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---
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id: 5900f4a01000cf542c50ffb2
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challengeType: 5
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videoUrl: ''
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localeTitle: 问题307：芯片缺陷
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---
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## Description
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<section id="description">
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k个缺陷随机分布在一家工厂生产的n个集成电路芯片中（在芯片上可以发现任何数量的缺陷，每个缺陷与其他缺陷无关）。
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令p（k，n）表示存在至少3个缺陷的芯片的概率。
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例如p（3.7）≈0.0204081633。
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找到p（20,000，1 000 000）并以0.abcdefghij的形式将答案四舍五入到小数点后10位。
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</section>
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## Instructions
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<section id="instructions">
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>euler307()</code>应该返回0.7311720251。
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testString: assert.strictEqual(euler307(), 0.7311720251);
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function euler307() {
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// Good luck!
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return true;
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}
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euler307();
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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/section>
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