Question 1183552
Again this problem should be EASY application of the law of total probability and Bayes' theorem.

The solution to this problem is very similar to the one I gave earlier.  The only difference being, in the first problem, {{{P(U1)= 1/2}}} and {{{P(U2) = 1/2}}}, 
but for this problem, {{{P(U1) = 3/4}}} and {{{P(U2) = 1/4}}}.

Fill in the corresponding probabilities for the formula I included in the first problem.