Division M2 session on Feb 21, 2016

Instructor:	Mr. Isa Hafalir, Mr. Ahmed Hefny
Attendance:	Ayan, Adan, Omar, Baseer
Handout:	Purple comet problems
Problems Solved in Class:	- Problems 1-5 of 2015 Purple Comet test - Examples from "Introduction to Counting and Probability"
Concepts:	Counting: - Counting number of elements in a list: Off-by-one errors, problem reduction: reduce a more difficult problem to a simpler one; transforming elements in a list does not change the number of elements. - Counting using Venn diagrams- Constructive Counting: Define a generative process to create solutions such that the number of possibilities in each step of the process can be counted. - Complementary Counting: When counting the number of solutions that satisfy a condition, sometimes it is easier to count the number of solutions that do NOT satisfy the conditions (let's call that x). The answer then would be:answer = number of all solutions - x
Student Difficulties:
Homework:	Homework due 3/6: Purple Comet Problems: Problems 6-15 Counting:  https://www.dropbox.com/s/zy3vdbrdj4ifrsw/CountingDay1.pdf?dl=0
Notes:	* Please bring working sheets and pencils to upcoming sessions. * A competition will be held on 2/28. It will cover all concepts discussed so far. Use purple comet handout for preparation.