can anyone help me with a probability question?

Usually someone can help. Advanced college level probability questions often go unanswered.

What is the question?

Students in a given class were graded A, B, C, D, and F in proportions of 1:3:4:1:1, respectively.

How much information is contained in the message
(a) You passed
(b) You did not get a B

Of course! I can definitely help you with a probability question. Just provide me with the details of your question, and I'll do my best to guide you through the process of finding the answer. Remember, understanding the steps to solve a probability problem is just as important as getting the answer. So, go ahead and ask your question!