Two sisters, Allison and Teri, have agreed to meet between 1 and 6 pm at the Startalks coffee shop on a particular day. In fact, Allison is equally likely to arrive at exactly 1 pm, 2 pm, 3 pm, 4 pm, 5 pm or 6 pm. Teri is also equally likely to arrive at each of these six times, and Allison Solution the answer is 1/6.