freeCodeCamp/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-181-investigating-in-how-many-ways-objects-of-two-different-colours-can-be-grouped.english.md

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

## Description
<section id='description'>
Having three black objects B and one white object W they can be grouped in 7 ways like this:
(BBBW)(B,BBW)(B,B,BW)(B,B,B,W)
(B,BB,W)(BBB,W)(BB,BW)
In how many ways can sixty black objects B and forty white objects W be  thus grouped?
</section>

## Instructions
<section id='instructions'>

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>euler181()</code> should return 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>