---
id: 5
localeTitle: 5900f4231000cf542c50ff34
challengeType: 5
title: 'Problem 181: Investigating in how many ways objects of two different colours can be grouped'
---

## Description
<section id='description'> 
Teniendo tres objetos negros B y un objeto blanco W, se pueden agrupar de 7 formas como esta: 
(BBBW) (B, BBW) (B, B, BW) (B, B, B, W) 
(B, BB, W) (BBB, W) (BB, BW) 
¿De cuántas maneras se pueden agrupar sesenta objetos negros B y cuarenta objetos blancos W? 
</section>

## Instructions
<section id='instructions'> 

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler181()</code> debe devolver 83735848679360670.
    testString: 'assert.strictEqual(euler181(), 83735848679360670, "<code>euler181()</code> should return 83735848679360670.");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function euler181() {
  // Good luck!
  return true;
}

euler181();
```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>