There are many kinds of drinks in a large cooler in the cafeteria. Fifteen percent of them are decaffeinated. After class (five days a week), Alice always needs a drink. She is always running to her next class, and the cafeteria is busy, so never has time to pick a specific one. She likes caffeine, so she will be "happy" if she gets caffeine four or more times during the five day week. What is the probability that Alice is happy this week?