1. Histogram. As explained in class, the key to making this museum demostration work is that the number of balls in each bin is basically a bin count as in a histogram. 2. The TA changed the question during the quiz. It was originally asking for P(N >= 30 | N >= 25), but it became P(N >= 30). The former is (1 - ppois(29,28.8))/ (1 - ppois(24,28.8)) while the latter is 1 - ppois(29,28.8) 3. For G(2/3), find c such that P(Xbar <= c) = 2/3. By adding the probabilities, c = 70.5.