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Determining the number of different lawn plots Barbara needs can be considered a series of three events. She has five fertilizer types, six temperature zones, and two water treatments to test. State the number of outcomes for each event. fertilizer outcomes temperature outcomes water outcomesRecall the Counting Rule for Combinations; the number of n objects taken rat a time is C, = r! (n - r)! where n and r are whole numbers and n 2 r. The total number of available software packages is 9 and customers may choose 3 of these packages. Use the formula to compute Co,3, substitute for n and for r, and simplify. 9! n! r! (n - r)! 31 9 - 9! = 3