1. If a fair die was tossed four times in a minute, how many times would you expect even numbers to show up in a 15-minute interval?
2. The average number of accidents in a randomly chosen day at the factory is 0.7. What is the chance that there will be no accidents in any given day at the factory?
3. The number of prawns in a randomly chosen prawn dumpling is 2.2. What is the chance that there is at least one prawn in a randomly chosen dumpling?
4. Between 9a.m. and 10a.m., the reception counter of a company receives visitors at a rate of 5 per ten minutes. Assuming that the visitors arrive at random points in time, determine the probability that:
a. no visitors arrived in a randomly chose minute
b. at least one visitor arrived in a randomly chosen fifteen-minute period.