Question 1010365

How many way's can 6 people arrange themselve's in a 
photograph if 2 of them cannot be beside each other?
<pre>1<sup>st</sup> position: 5 ways
2<sup>nd</sup> position: 4 ways
3<sup>rd</sup> position: 4 ways
4<sup>th</sup> position: 3 ways
5<sup>th</sup> position: 2 ways
6<sup>th</sup> position: 1 way

Number of ways: 5 * 4 * 4 * 3 * 2 * 1, or {{{highlight_green(480)}}}