Posted by Jen on .
30 basketballs (15 Spalding, 10 Wilson, and 5 other brandname balls) are on a basketball court. Barry Wood closes his eyes and arbitrarily picks up a ball from the court. Determine the probability that the ball selected is
a Wilson or a Spalding.

Math 
Reiny,
Jen, I had answered that for you earlier this morning.
http://www.jiskha.com/display.cgi?id=1311049342