1.7, due September 17th

I read the section. What I thought was most difficult is that there are several formulas we need to learn. Most importantly, the binomial theorem and the following corollarys. Besides that, the section was fairly short. What I thought was most interesting was all the n choose k examples. In particular, I was intrigued by how they calculated the number of possible strings of letters formed from the word mississippi. What's even more astounding is how simple it is to calculate it. It's just 11! divided by the number of each individual letter factorial. This is some cool stuff.

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