Your employer says that the flood in 2010 was a 100-year flood and the flood in 2009 was a 200-year flood so it will be at least 300 years before we see another flood like them. Is your employer correct?

No, employer is not correct.

Explanation:

The two floods happened year after year. which means that the hundred year gap between the 200year flood and 100year flood turned to a year gap. This one year gap was a hundred year gap. Hence, the occurrence is random.

well this isn't a question but if you are asking if it is true or false it is, true.

answer; revisionist;