Answer
1/4
Explanation
The number of the digit is 4
The number of ways of forming 3 digit numbers= p(4,3) =24
The number of 3 digit numbers that is divisible by 2 =c(4,2)=6
(Since the numbers are 1,3,4 and 3,4,5)
Therefore the probability of forming a 3 digit number=6/24 =1/4
