Prompt
1. A class survey found that 25 students watched television on Monday, 20 on Tuesday, and 16 on Wednesday.
those who watched TV on only one of the days, 11 chose Monday, 7 chose Tuesday, and 6 chose Wednesday. If
every student watched at least one of the days and 7 students watched all three days, find the number of students
the class. [100 points]
