General and Particular Solutions

Hi all, I think I'm in the correct section to post this. I'm here for some help on a specific problem. The problem is asking me to find "a general solution and 3 particular solutions" to the problem. However, I have no idea what a general or particular solution is. And my professor nor my math book have made any mention of either So if anyone could explain that it would be much appreciated.

Here's the actual problem:

"California coffee roasters sells Kona coffee for $22.95 per pound and Columbian coffee for $6.75 per pound. Suppose they offer a blend of the two coffees for $10.80 per pound. What amounts of Kona and Colombian coffee's should be blended to obtain the desired mixture?"

The problem to go along with it is:

"Is there sufficient data to determine a unique solution?"

I'm pretty sure there is not.

"If no, find a general solution to the problem and write 3 particular solutions from it."

And this is where I'm stuck. I'm not looking for someone to come and answer the problem for me, I just don't know what it is I'm supposed to find. (Headbang)