Identify the oldest monotheistic religion

Which of the following emerging technologies uses the principle of chromosomes to identify suspects

How would i answer this for an exam?

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.