Assume that the chance of a son-murdering psychopath finding a way to kill her children, without leaving evidence of physical harm, is: with A = two of her children are found dead with no evidence of...

Assume that the chance of a son-murdering psychopath finding a way to kill her children, without leaving evidence of physical harm, is:

with A = two of her children are found dead with no evidence of physical harm and B = a mother is a son-murdering psychopath = 0.50$. Assume that the rate of son-murdering psychopaths mothers is 1 in 1,000,000. According to Bayes’ rule, what is the probability of Pr(B | A) ?