An engineer is scheduled to visit three manufacturing plants in habado,hibadi,hobada a. How many different sequences or orders of visiting these three plants are possible? b. In how many different orders can the 3 plants be visited if plants located in Isabela can be considered identical? 10. The number of students who fail per semester is often modeled as a Poison random variable. Assume that on the average there are 5 students who fail per sem

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