Suppose that wait times at a dentist's office follow an Exponential distribution, with an expected wait time of 18 minutes. Round answers to one decimal if needed. To ensure accuracy, keep the decay parameter as a fraction (don't round) when doing calculations. a. What percent of patients wait more than 22 minutes? b. What is the percentile of a 14 minute wait? c. Find the 80th percentile of wait times.
Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.
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