Asked by Tiff
It's been so long since I've donw combinations, and now I have a question about them in my algebra homework packet. Question is....Marcie has a collection of 9 DVDS. She will choose 4 of them to take in the car to watch during a long trip. How many combinations of 3 DVDS can Marcie take from her collection ? 504, 252, 168, or 84 ?
Answers
Answered by
drwls
Please clarify if she is taking 3 or 4. You say both numbers.
If she is taking 4, the answer is
9!/(4!*5!) = 9*8*7*6/(1*2*3*4)
= 9*8*7/4 = 126
If she is taking 3, the answer is
9!/(3!*6!) = 9*8*7*6/3! = 9*8*7 = 504
If she is taking 4, the answer is
9!/(4!*5!) = 9*8*7*6/(1*2*3*4)
= 9*8*7/4 = 126
If she is taking 3, the answer is
9!/(3!*6!) = 9*8*7*6/3! = 9*8*7 = 504
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.