Problem: calculate the correlation coefficient of X and Y which have the following joint pmf: p(x, y), y = 0, y = 1, y = 2 x = 0, 0.05, 0.05, 0.15x = 1, 0.15, 0.15, 0.10 x = 2, 0.05, 0.10, 0.05 x = 3, 0.05, 0.10, 0.00

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?