Category(X):	0-2	3-6	7-10	11-14	15-18	19-22	23-26	27-30	31-34	35-38	39-42	43-46	47-50
P(X=x):	0	0	0	0	0	0	0	0	0.0769	0.103	0.0769	0.308	0.436