Question

May someone please explain this Algebra problem?

http://img338.imageshack.us/img338/8788/evalexpr.png

Is it 4,096? Please respond, thanks! :D

Answer 1

it's a frog in an ice cube

Answer 2

.... May someone SERIOUSLY explain it? Thanks.

Answer 3

\[ ^{n}P_k=\frac{n!}{(n-k)!}\]
u know how to evaluate n! ?

Answer 4

and its not 4096

Answer 5

I have no idea! Please, explain. :)

Answer 6

ok,1!= 1
2!=2*1=2
3!=3*2*1=6
4!=4*3*2*1=24
5!=5*4*3*2*1=120
.
.
.
.
n!=n*(n-1)*(n-1).....3*2*1
1st did u get this,then we move to P.

Answer 7

Uhm... let's see... I'll try answering the problem with that. ^^

Answer 8

would it be 32?

Answer 9

the final answer 32 ? nopes.

Answer 10

whats 8! ?

Answer 11

8

Answer 12

Wait.. would it be 70?

Answer 13

what?
n!=n*(n-1)*(n-1).....3*2*1
so
8!=8*7*6*5*4*3*2*1
ok?

Answer 14

1,680! :D

Answer 15

thats correct,u solved it, right?

Answer 16

of course, let's try another! :D

Answer 17

19P^4

This is 3,876, right?

Answer 18

19P4=93024

Answer 19

Oops, more practice! Thanks for staying with me!

12P^10

Answer 20

239,500,800?

Answer 21

12P10 is really biggggg!

Answer 22

Yes, I'm aware.

Answer 23

Hence my REAALLLY BIIIG answer! :)

Answer 24

.... hello?

Answer 25

yup,correct

Answer 26

Yay!

Answer 27

Oh, here's another one that's different, but tricky!

Answer 28

sorry for late responses,......my slow net speed...

Answer 29

(7P6)(12P2)

Answer 30

Is it 665,280?

Answer 31

thats correct,u are becoming expert! :D

Answer 32

Yay! :D

Answer 33

Some more! :D

Answer 34

Hold on a sec

Answer 35

9C8

is it 362,880?

Answer 36

9C8 is 9
notice its C now not P

Answer 37

72

Answer 38

what 72 ?
9C8=9C1=9

Answer 39

My mind is silly.. Either 9... OR 43,046,721?

Answer 40

where does 43,046,721 come from ??

Answer 41

english is my third language. i cant explain. :P

Answer 42

it's 9, though?

Answer 43

yup,its 9
u know the defination of nCr ?

Answer 44

i gotta go soon. one more, I swear!

19c18

is it 19?

Answer 45

or 19C18

Answer 46

yes its 19
remember
nC(n-1) is always n
so,9C8=9
19C18=19
119C118=119
ok?

Answer 47

Ok, thank you very much! you were of big help!

Answer 48

Mrs. Moyer’s class has to choose 4 out 12 people to serve on an activity committee. Does this situation represent a permutation or a combination?

It's combination, correct? :D

Answer 49

'choose'== combination
'arrange'== permutation
generally

Answer 50

so yes,correct :)

Answer 51

AH, thanks!

Answer 52

anymore questions?