79d9012432
* fix(curriculum): tests quotes * fix(curriculum): fill seed-teardown * fix(curriculum): fix tests and remove unneeded seed-teardown
62 lines
1.3 KiB
Markdown
62 lines
1.3 KiB
Markdown
---
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id: 5900f4551000cf542c50ff67
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challengeType: 5
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title: 'Problem 232: The Race'
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---
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## Description
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<section id='description'>
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Two players share an unbiased coin and take it in turns to play "The Race". On Player 1's turn, he tosses the coin once: if it comes up Heads, he scores one point; if it comes up Tails, he scores nothing. On Player 2's turn, she chooses a positive integer T and tosses the coin T times: if it comes up all Heads, she scores 2T-1 points; otherwise, she scores nothing. Player 1 goes first. The winner is the first to 100 or more points.
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On each turn Player 2 selects the number, T, of coin tosses that maximises the probability of her winning.
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What is the probability that Player 2 wins?
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Give your answer rounded to eight decimal places in the form 0.abcdefgh .
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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>euler232()</code> should return 0.83648556.
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testString: assert.strictEqual(euler232(), 0.83648556, '<code>euler232()</code> should return 0.83648556.');
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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 euler232() {
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// Good luck!
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return true;
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}
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euler232();
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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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