look please help me due tomorrow

[bobe]

an atm keypad contains all the numbers 0 thru 9 what is the proability that a 4 digit code contains all even numbers is it
A 1 half
B 1/4th
C1/8th
or D 1/16th

 

[arthur ohlsten]

how many 4 digit combinations?
the first digit any of 10
2nd any of ten, etc.
total 10^5

assume 0 a even digit

how many 4 digit even combinations
1st any of 5
2nd any of 5
etc

probability= 5^4/10^4
probability= 1/16

Arthur