A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
Evaluate 15C2 and 15P2
anonymous
 5 years ago
Evaluate 15C2 and 15P2

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0well...we did a similar one earlier no? 15c2 you can do just like we did earlier...for 15p2 the formula is different...i'm sure your book has it...please look it up...if you can't find it i'll show you...but u need ot try to find it first

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0almost try that one again.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0that one is good...now do the permutation one

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0have you found the formula for permutations? it's slightly different...but looks almost like combination

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no...that's not it permutation is n!/(nr)!

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yes...but don't forget the factorials!

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so u do 15 times 14 times 13 times 12 times 11 times 10 or?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the reason i wrote it like that is because i wanted the 10! on the top to cancel with the 10! on the bottom

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0but this time we don't have 10! on the bottom, instead we have 13!...write it like this:

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0let me know if that makes sense

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so we do 15 times 14 times 13?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0try to be clever with the way you write it, so that you can cancel as much as possible...technically you can just multiply EVERYTHING. but that will give you HUGE numbers...better to cancel...so we make our lives easier

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0and thats the answer to the first one?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0well, at least multiply it out...what do you get?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0after you cancel stuff...multiply and see what number you get

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0but thats not the answer

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0after you cancel you should only have 15*14 left

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0cause the 13! cancelled with the 13! in the denominator

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0correct...and what's left on the bottom?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0it was 105 u made me mess up

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0^_^ i did? ... well...it was 210 on the top and 2 on the bottom...so you have 210/2 = 105

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0...of course not...you have to find the answer yourself

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0now what about the permutation one?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i am gonna post a new one now

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0because u made me get it wrong
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.