In one of the banks in Davao City, the number of tellers (X) are busy with customers at 12:00 noon that varies from day to day. Past records indicate the probability distribution of X below, Number of Tellers (X) Probability P(X) 0.095 1 0.265 0.285 0.205 0.150 Answer the following questions: at 12.00 ioon 4. What is the probability that, at least to two, but fewer than four tellers are busy at 12:00 noon? 5. Solve and interpret the mean and variance of the probability distribution?

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Counting Principles

In statistics, the counting principle can be said to be the concept in which the quantity of an item is determined. There can be a single item, or a group of items, or items that are related to each other. In every possible set of items, the quantity of the possible item groups or their sorting measures can be determined with counting principles.