Posted by Angie on Monday, September 7, 2009 at 2:43pm.
a set of building blocks includes blocks of various shapes and colors. if 10% of the blocks are cubes, and 40% of the cube blocks are red, then what percentage of the blocks are red cubes

statistics  MathMate, Tuesday, September 8, 2009 at 1:26pm
Assuming the colours are uniformly distributed over the shapes, we can use the multiplication rule to get
P(red cubes)=P(red)*P(cubes)=0.4*0.1=0.04