0 votes 0 votes Show that if there are $30$ students in a class, then at least two have last names that begin with the same letter. Combinatory kenneth-rosen discrete-mathematics counting pigeonhole-principle descriptive + – admin asked Apr 29, 2020 admin 2.8k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
1 votes 1 votes We have 26 letters(pigeonholes), and 30 students (pigeons) so using Pigeonhole Principle we have ceiling (30/26) = 2 Mohit Kumar 6 answered Apr 30, 2020 Mohit Kumar 6 comment Share Follow See all 0 reply Please log in or register to add a comment.
