Need help with this statistical biology question

Question

for 2 genes Tp53 and MYC if event A={mutated Tp53}, B= {mutated Myc} and p(A)= p(A|B) can you prove that MYC mutation or not is independent with TP53 genotype?  

(Hint: consider genotype of each gene as either mutated or wild type)

Answer 1

If p(A) = p(A|B) then the presence of B has no impact on the probability that A will occur.

Unfortunately do not see enough information to determine if the presence of A has any effect on the probability of B.