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anonymous
 4 years ago
In how many ways can 2 singers be selected from 10 who came to audition?
anonymous
 4 years ago
In how many ways can 2 singers be selected from 10 who came to audition?

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amistre64
 4 years ago
Best ResponseYou've already chosen the best response.010 for the first spot, and 9 left for the second spot = 10*9, or 10P2

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0good idea, wrong application i believe

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0this isnt a nCr, its an nPr

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i don't understand how it's not 90, because that's what i did to. how do I knew when i can and cannot use that process amistre did?

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0whenever you have to pick from a number of applicants, its P for "pick" in my eyes

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0whenever the order doesnt matter, then its groups that count. nCr for groupings

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.010 Pick 2 = 10P2 = 10*9 = 90

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0This should be \(\binom{10}{2} = 45 \)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Fair enough, I've never had to use P... Whenever I've done this in stats (ie with Binomial distribution) it's been nCr...

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0How does the order matter in this, isn't it just saying 2 singers?

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0i could be wrong, depends on how you interpret the question

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0if you have 2 people that are auditioning; then you need to pick 1 for the 1st and 1 for the 2nd

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0the answer is 45 i know that for sure, just trying to understand

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0joe then sally is a different order than sally then joe

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0No, as there are many different ways of picking 2 people from a bag of 10, which is different from picking 10 from a bag of 2...

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0amistre, >>In how many ways can 2 singers be selected from 10 who came to audition? "selected" is the keyword here.

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0i can see that interpretation as well :)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0But unfortunately 10P2 doesn't seem to be the correct interpretation here. :(

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0right, then if it aint 90, go 45 ;)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0how do i put this into a calculator? its not 10!2 is it because that doesn't work

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0the button that looks like nCr you would type 10 'nCr' 2

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0sooo 10!/2!(102)! perhaps?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0which gives you an answer of 45.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0or the factorial method, yes!

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.010*9*8*7*6*5*4*3*2  8*7*6*5*4*3*2*2

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0sorry i totally forgot how to do this. when i click permutations it puts in nPr() on the screen. where do i put the 10 and 2? and why is it 10 and 2 instead of 2 then 10?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0It is 10C2 because 10 (n) is the number of values and 2 (c) is the number you are choosing.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I don't know how you would do it in that format, you know your calculator best.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so its combination or permutation?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok its a combination because the order does not matter. i did this and got 45.
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