Posted by John on Monday, April 16, 2012 at 7:45pm.
A math teacher is randomly distributing 15 rulers with centimeter labels and 10 rulers without centimeter labels. What is the probability that the first ruler she hands out will have centimeter labels and the second ruler will not have labels.

Math  Reiny, Monday, April 16, 2012 at 7:55pm
what is (15/25)(10/24) ?
I answered this before
http://www.jiskha.com/display.cgi?id=1333472784