Originally Posted by

**Plato** This is almost impossible to stop. I gave up several years ago.

**My turn then**

I do not think that this has any use in answering the second question.

Had the question been put as: "What is the probability that the first ace appears within the first three deals?"

Then that question leads naturally to the second question about *nine*.

**Agreed, but the student still must cope with the first question as posed, or have I misunderstood your point.**

The answer that I gave is what is often called "*a back-of-the-book solution*".

The idea being to present the learner with the complete solution and then demand an explanation from the learner.

But hay what do I know, I only taught *probability theory* at a university for over thirty years?