How many 4-digit combinations are there such that no digits repeat and all of the digits are from 0 through 9?

*Check all that apply*

A. 10!/(10-4)!
B. 10P4
C. 10 x 9 x 8 x 7
D. 10!

I think B and C are correct, but I'm not sure about the others.

Question

How many 4-digit combinations are there such that no digits repeat and all of the digits are from 0 through 9? 

*Check all that apply*

A. 10!/(10-4)!
B. 10P4
C. 10 x 9 x 8 x 7
D. 10!

I think B and C are correct, but I'm not sure about the others.

anonymous · Answer

Yes B + C are correct.

anonymous · Answer

Are they the only ones that are correct?

anonymous · Answer

Well in the Equation it says all numbers between 0-9.....wich makes 10 out of the question because its not 0-9. , but A is also correct A=2.5 which is in 0-9 so its ABC sorry i stand corrected

anonymous · Answer

Ohh ok, I get it. Thanks bro much appreciation.

anonymous · Answer

No problem :)