The polygons in each pair are similar.  Find the missing sid…

The polygons in each pair are similar.  Find the missing side length.                                                                                                      

A dance CD has 12 songs on it – 9 are slow, and 3 are fast. …

A dance CD has 12 songs on it – 9 are slow, and 3 are fast.  When the DJ at a dance plays a song it is not played again.  All songs from the CD are played at random.What is the probability that the first two songs played are slow songs?