Los Angeles Math Circle

4/12: Group A: Counting and Probability Techniques;
Group B: What is Cryptography?

Group A homework: 7.2.2, 7.2.3 7.3.1, 7.3.3, 7.3.4 7.4.1, 7.4.3, 7.4.6 Challenge: 7.22, 7.24