A five-digit number is formed by using digits 1, 2, 3, 4 and 5 without repetition. What is the probability that the number is divisible by 4?
Select.
A) 1/5
B) 2/5
C) 3/5
D) 4/5
E) 6/5
A number divisible by 4 formed using the digits 1, 2, 3, 4 and 5 has to have the last two digits 12 or 24 or 32 or 52.   In each of these cases, the five digits number can be formed using the remaining 3 digits in 3! = 6 ways.   A number divisible by 4 can be formed in 6 x 4 = 24 ways.   Total number that can be formed using the digits 1, 2, 3, 4 and 5 without repetition = 5! = 120.   Hence, the required probability would be 24/120 = 1/5.   1/5NSWER:1/5
<result>A</result>
A five-digit number is formed by using digits 1, 2, 3, 4 and 5 without repetition. What is the probability that the number is divisible by 4?