The figure above represents four offices that will be assigned randomly to four employees, one employee per office…

The figure above represents four offices that will be
assigned randomly to four employees, one employee
per office. If Karen and Tina are two of the four
employees, what is the probability that each will be
assigned an office indicated with an X ?

The figure is Four boxes or (offices) and two of them are labeled X.

What are your thoughts on using the permutations and combinations formula?

In a post I read of yours you said that with the exception of 3 things (lines, ……) there are no other formulas you should memorise. In other posts of your I have seen you use the combinations formula. What are your thoughts on using the permutations and combinations formula ?

Could you point me in the direction of any posts you have made (or section in your book) where you discuss counting problems specifically.

Thanks man

Relativism (On the skinning of cats*)

* I don’t advocate violence towards cats (or other animals). “There’s more than one way to skin a cat” is a phrase that I used to hear all the time growing up, but that I now realize (having received some mortified stares at its utterance) that it’s not as common as I thought it was. (more…)

Counting: Oh, the possibilities

Source. One technique-able counting problem type that you might come across on the SAT is what I’ll call a “possibilities” problem*. It might involve cards (but not playing cards – the SAT doesn’t like those), or pictures being lined up on a wall in different orders. Your job will be to determine the number of (more…)

The counting questions that are really just listing questions

An unfortunate truth about the SAT is that while many questions can be answered with snappy tricks (many of which can be found on these pages), not all of them can. Most “counting” questions (and probability questions, for that matter) fall into this category. Yes, I’m serious. Most. Basically, if you don’t see within 15 (more…)

Weekend Challenge – Labor Day edition

This Labor Day weekend I’m going to the wedding of one of my oldest friends from my hometown. Combine the fact that the number of my friends who aren’t married is dwindling dangerously close to zero and the fact that I wasn’t able to attend this year’s fantasy football draft so I had to autodraft (more…)

One kind of counting question

The SAT will throw two common kinds of “counting” problems your way. I’ll handle one of them in this post. The other kind, well, I’ll get to it when I get to it. 🙂 I like to call this kind of problem a matching problem. It’ll usually involve a bunch of people who all need (more…)

Weekend Challenge – With an ACTUAL PRIZE

I lifted a box that was too heavy this week and I screwed up my back so bad that every time I put weight on my right foot, searing pain shoots up my entire right side. Getting older is awesome! The prize this week for the first correct response: FREE Beta Access to my book. (more…)