Hey Mr. Max!
I forgot my old login name, so I made a new one.. I forgot though that you had to approve me so I could post, so I wasnt able to post it on the wiki. I have my entry, hopefully it's not too late. I was going to try and find you at Swan -- poluz -- a? .. whatever, but I didn't see you. Anyways, here it is:
PROBABILITY - Use Pascal’s Triangle to find..
Use Pascal’s Triangle to find the number of ways to choose 3 shirts from 7 shirts.
This can be solved in two different ways:
First, Pascal. Since you have 7 shirts, go down to the 7th row. And because you have 3 shirts to choose from, go over three. You should get an answer of 35.
Credit for image: http://mathforum.org/workshops/usi/pascal/patterns_pascal.html
You can also solve this on your calculator.
For this question we must use n Cr on your Ti-83 Calculator. So, punch in a number seven (the number of shirts) and than press MATH than go over to PRB than use 3: nCr, press enter and than press the number three (3 shirts). Press enter and you should get 35.
7 nCr 3 = 35 ways to choose three shirts from seven.
Have a great summer Mr. Max!! =)