The number of flowers N appearing on an apple tree is a random variable, with
distribution P[N = n]=p^n . Assume that a
flower turns into a fruit with probability Alpha (binomial distribution)
Given that there is a number r of apples on the tree, what is the probability that originally there were n flowers on it?
Conditional P[r apples / n flowers]=binomial distribution = P (r apples Joint n flowers)/P(n flowers)
here I can get P (r apples Joint n flowers) in terms of the other two known expressions
Conditional P [n flower / r apples] = P (r apples Joint n flowers)/P(r flowers)
is there a way of calculating p (r flowers)? I cannot draw out the diff between venn diagrams of p (r flowers) and P[r apples / n flowers]