import numpy as np
import scipy.stats as st
import matplotlib.pyplot as pltPoisson = st.poissonX = Poisson(3.5)
X.pmf(2)0.184958973461700821 - np.sum(X.pmf(np.arange(3)))0.6791528011378659np.sum(X.pmf(np.arange(3, 10000)))0.679152801137866# 2
X = Poisson(5)
X.pmf(7)0.10444486295705395np.sum(X.pmf(np.arange(4)))0.26502591529736164Y = Poisson(10)
1 - np.sum(Y.pmf(np.arange(11)))0.4169602498070133X = Poisson(5)
X.pmf(3) # a
X.pmf(0) # b
Y = Poisson(20) # c
1 - np.sum(Y.pmf(np.arange(21)))0.44090741576867676