Question

ok is this permutation or combination and how many possible outcomes r there. writing a four digit # usingthe #s 0-9 with no repeats

Answer 1

permutation= order matters...and combination=order does matter.

If you are writing a 4 digit number, order does matter because what goes in the first place will effect the second number, and the first and second will affect the 3rd..and so on. since there are no repeats

therefore it is a permutation

Answer 2

but whats the answer

Answer 3

you multiply the number of choices you have for each digit together

Answer 4

for example first digit 10 choices
second digit 9 choices (since no repeats)

Answer 5

so it would be 9 times 8 times 7 times 6

Answer 6

well the first digit has 10 choices since there are 10 numbers from 0 to 9...

so its
10 times 9 times 8 times 7

Answer 7

the answer in the back of the book says the answer is 35 how is that possible

Answer 8

how is that possible

Answer 9

hm....let me think about that

Answer 10

is that the whole question? or is there some missing information?

Answer 11

thats it

Answer 12

ayms its fine i will figure it out later i have 2 periods to figure it out tomorrow

Answer 13

i dont think it's 35. I'm pretty sure its 5040

Answer 14

actually it is not 10*9*8*7, the first digit may not be a 0 as that would be a 3 digit number, it is 9*9*8*7=4536