Probability distribution--should these equal one?
I'm supposed to prepare a probability distribution for the following question:
Two balls are drawn from a bag in which there are 4 white balls and 2 black balls. The number of black balls is being counted.
So x = number of black balls.
Should those equal 1, or is it okay that they don't? I got .088 + .263 + .329, which doesnt = 1. Are my calculations correct?