A local coffee chain is running a contest where a random selection of coffee cups contain a prize. The coffee chain claims that the odds of winning are 1 in 10. A friend of yours has purchased 10 coffees and has not yet won a prize. Naturally, your friend thinks the chain has lied about the odds of winning. Perform a probability calculation to investigate the claim that the odds of winning are 1 in 10. What do you tell your friend?