Gregor Mendel (1822–1884), an Augustinian monk, is credited with developing a model that became the foundation of modern genetics. In his experiments, he crossed purple-flowered plants with white-flowered plants and found that 3 4 of the offspring plants had purple flowers and 1 4 of them had white flowers. Consider a group of twenty-four offspring plants. According to this concept, when the plants begin to flower, how many will have purple flowers?