How many options are there for a code consisting of 2 even digits followed by 2 odd digits?
Choose the correct choice from the following options
A) 4^5  B) 5^4  C) 5^5  D) 4^4  E) 10^4
Even Numbers = 5 digits { 0 , 2 , 4 , 6 , 8 }   Odd Numbers = 5 digits { 1 , 3 , 5 , 7 , 9 }   EVEN EVEN ODD ODD   No of ways is 5*5*5*5 = 5^4   Hence, correct, answer must be (5^4) 5^4
<result>B</result>
How many options are there for a code consisting of 2 even digits followed by 2 odd digits?