The students in Mr. Duros class were each assigned a unique 2 digit, non-repeating number. If Mr. Duros uses only the digits 0, 1, 2, 3, and 4, to create the numbers, how many differenttwo digit students are possible?

A.1O
B.8
C.20
D.12

Explain please?

Question

The students in Mr. Duros class were each assigned a unique 2 digit, non-repeating number. If Mr. Duros uses only the digits 0, 1, 2, 3, and 4, to create the numbers, how many differenttwo digit students are possible?

A.1O
B.8 >>>>>
C.20
D.12

Explain please?

anonymous · Answer

It is C.
For the first digit there are 5 options (0,1,2,3,4)
but for the second digit, since the number cannot repeat there are only 4 options.  
and 5*4=20

freckles · Answer

|dw:1431112596515:dw|

anonymous · Answer

5 times tight? Because there are 5 numbers given to me?