The numbers 1, 2, 3, 4 and 7 are given.
A three-digit number is randomly generated from the given digits, in which the digits can be repeated. What is the probability of forming a number that is divisible by 4?
A three-digit number is randomly drawn from the given digits, in which the digits must not be repeated. What is the probability of forming a number that is divisible by 3?
