Astudy of traffic patterns in a large city shows that if the weather is rainy, there is a 50% probability of an automobile accident occurring during the morning commute. if the weather is clear, the probability of an accident is reduced to 25%. suppose the weather forecast for tomorrow predicts a 75% chance of rain.

At the county fair, animals are judged for the quality of their breeding and health. the animal pens are arranged in an array, with one animal in each pen. a barn can hold at most 10 rows of pens and at most 6 pens in each row, with room for people to walk around them. what different ways can the planners of the county fair arrange the pens for the horses and cows in the same barn?