1. ## Verify the following

could someone please give me some hints about how to prove this?

2. ## Re: Verify the following

sorry, i thought it worked when i previewed ... i'm not sure how to put it in code, but here's a picture

3. ## Re: Verify the following

any help would be much appreciated

4. ## Re: Verify the following

not a single person can help?

5. ## Re: Verify the following

Suppose that $a,~b,~\&~c$ are positive integers such that $a>b$.
Further, suppose that we have $a$ blue balls and $c+b$ red balls.
Now we put the balls all together in a box from which we randomly choose $b$ balls.
Surely you can see that we can choose from $0\text{ to }b$ blue balls.