Question 1156380
7 coming to the pond with parameter 6 is e^(-6)*6^7/7!=0.1377

in 15 minutes the parameter is 3 (Poisson is proportional to time) so e^(-3)3^7/7!=0.0216

More than 8 birds is 9 or more which is 0.544 from the table (complement). The table shows 0.456 through 8 as cumulative.