title: Odds / Probability of two things occuring
body: <p>I'm trying to determine the odds or probability of two things happening.  I know the odds of each but don't know how to combine them.</p>
  
  <p>The first occurrence is 1:25</p>
  
  <p>The second is 1:75</p>
  
  <p>How do I calculate the odds of the first occurrence and the second occurrence both happening? </p>
  
  <p>It's for Bingo. The odds of someone winning bingo on one of 3 predetermined numbers AND having the win also occur on one of 75 predetermined numbers.  This is for a 75 number bingo game.</p>