The last one:
We have 8 bottles of Zinfandel. 10 of Merlot, and 12 of Cabernet.
If he wants to serve 3 bottles of zinfandel and serving order is important, how many ways are there to do this?
If 6 bottles of wine are to be randomly selected for the 30 for serving, how many ways are there to do this?
If 6 bottles are randomly selected, how many ways are there to obtain two bottles of each variety?
If 6 bottles are randomly selected, what is the probability that this results in two bottles of each variety being chosen?
If 6 bottles are randomly selected, what is the probability that all of them are the same variety.
Not even sure how to start this one. Any help?
Are these right?
Also, I have another general question. When should I use the following formulas:
Neither my book/teacher really explain the difference between these two. Is the first just the number of combinations, and the second a percentage of possibilities?
thanks, btw is #4 really correct? I think I get a different number than the answer, much appreciated!