Posted by Madison on .
If you have 30 white lego bricks, 42 red lego bricks, and 45 black lego bricks and you pull them out of a bag one at a time until one is left, what is the probability the last brick will be black

math 
bobpursley,
It would be the same as the probabity of pulling our a black first.
Pr=45/totalbricks