Mathematician joke

Statistics Canada is hiring mathematicians. Three recent graduates are invited for an interview: one has a degree in pure mathematics, another one in applied math, and the third one obtained his B.Sc. in statistics.

All three are asked the same question: "What is one third plus two thirds?"

The pure mathematician: "It's one."

The applied mathematician takes out his pocket calculator, punches in the numbers, and replies: "It's 0.999999999."

The statistician: "What do you want it to be?"