(Solution) - In a ten day period Ms Rosatone typed 84 letters to -(2025 Original AI-Free Solution)

Paper Details

In a ten-day period Ms. Rosatone typed 84 letters to different clients. She typed 12 of these letters on the first day, seven on the second day, and three on the ninth day, and she finished the last eight on the tenth day. Show that for a period of three consecutive days Ms. Rosatone typed at least 25 letters.