1. A software process picks a random number between 1 and 30. What is the probability that two odd numbers are picked in a row if numbers cannot be repeated?

 2. A software process picks a random number between 1 and 30. Numbers can be repeated on each iteration of the process. If the process is called 7 times and each time returns a number, what is the probability that exactly four of the numbers are divisible by 3?

 3. A software process picks a random number between 1 and 30. Numbers can be repeated on each iteration of the process. If the process is called 7 times and each time returns a number, what is the probability that at least two of the numbers are divisible by 3?

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