Hi Fnus,
The probability of getting one blue cube is . Due to the fact that the cubes aren't being replaced the probability of getting another blue cube is and so on and so fourth.
This gives an answer of
In a box there are 22 cubes, 12 red and 10 blue.
7 cubes are chosen at random.
Find the probability for the following events:
a. Among the seven cubes there are 4 blue cubes and 3 red cubes
There are others, but I've tried to do them, and for a I get something like..
0.00780 or something like that.
Which I think might be wrong..
So if anyone could just show me what to do, I think I can do the rest myself, thanks
In case people want a name : Hypergeometric distribution - Wikipedia, the free encyclopedia