title: Increasing / decrasing chance on random module
body: <p>For example I am programming a game . I need some money . Chests is free but keys is paid . How can I increase the chance of <strong><em>key needed premium chest</em></strong> and how can I decrase the chance of <strong><em>fully free premium chest</em></strong></p>
  
  <pre><code>import random 
  
  list1 = ["fully free premium chest", "key needed premium chest", "fully free normal chest"]
  
  
  random.choice(list1)
  </code></pre>