Alarge stamp book has 8 pages and each page has 8 stamps. a small stamp has 6 pages and each page has 4 stamps. if francois buy 1 large stamp book and 1 small. what is the total number stamps he will have.

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?