A grocery pick-up service has 12 appointment openings one morning. If 8 customers have signed up already:  An employee calls in sick, and the first two appointment openings need to be cancelled. How many ways can the appointments be arranged witht he first two morning openings left empty?

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A: To count the number of possible selections

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.