1. At the Fidelity Credit Union, a mean of 3.5 customers arrive hourly at the drive-through window. What is the probability that, in any hour, less than 2 customers will arrive? Round your answer to four decimal places.
2. What is the probability that a randomly selected person will have a birthday in January? Assume that this person was not born in a leap year. Express your answer as a simplified fraction or a decimal rounded to four decimal places.
3. Customer account "numbers" for a certain company consist of 2 letters followed by 4 numbers.
Step 1 of 2: How many different account numbers are possible if repetitions of letters and digits are allowed?
Step 2 of 2: How many different account numbers are possible if repetitions of letters and digits are not allowed?